|
What is the function of a red triangular daymark? |
To mark the centerline of a navigable channel |
To mark a prominent object of navigational interest |
To mark an area of a channel where passing is permitted |
To indicate the starboard side of a channel |
|
Which is a feature of a special daymark? |
A
red-and-white octagon |
A
yellow diamond |
A
green square |
A
daymark with a yellow stripe on it |
|
How do preferred channel buoys indicate the preferred channel to
transit? |
The buoy's light rhythms |
Odd or even numbers |
The color of their top band |
The location of the buoy in the channel junction |
|
What does a white buoy with an open-faced orange diamond on it indicate? |
The buoy is a mooring buoy |
Vessels are excluded from the area |
Operating restrictions are in effect |
Danger |
|
the U.S. Aids to Navigation System on the Western Rivers, a preferred
channel buoy to be left to port while proceeding downstream will
__________. |
have the upper band red |
show a red light if lighted |
have a characteristic of composite group flashing if lighted |
All of the above. |
|
Yellow lights may appear on which buoys? |
Horizontally-banded buoys |
Special purpose buoys |
Spherical buoys |
Vertically-striped buoys |
|
As you enter a U.S. channel from seaward, which is TRUE concerning the
numbers on the buoys? |
increase in channels going to the north or west, and decrease in
channels going to the south or east |
increase with the can buoys being odd numbered |
increase with the can buoys being even numbered |
decrease with the can buoys being even numbered |
|
Which term is given to a light that has a light period shorter than its
dark period? |
Pulsating |
Flashing |
Occulting |
Alternating |
|
How are buoys which mark isolated dangers are painted? |
Alternating red and white stripes |
Alternating green and white bands |
Alternating red and black bands |
Alternating green and black bands |
|
How are aids to navigation marking the intracoastal waterway identified? |
The light characteristic and color for lighted aids |
Yellow stripes, squares, or triangles marked on them |
The letters ICW after the aid's number or letter |
White retro-reflective material |
|
Under the U.S. Aids to Navigation System on the Western Rivers, which
describes the daymarks on the right descending bank? |
Red diamond-shaped panels with red reflector borders |
Green square-shaped panels with green reflector borders |
Red triangular-shaped panels with red reflector borders |
Green triangular-shaped panels with green reflector borders |
|
Under the U.S. Aids to Navigation System on the Western Rivers, which is
TRUE of a daymark on the right descending bank? |
It will have an odd number |
It will indicate the gage reading |
Must contain yellow retro-reflective markings |
It shall be green in color |
|
What do red sectors of navigation lights warn mariners of? |
Floating debris |
Heavily trafficked areas |
Recently sunken vessels |
Shoals or nearby land |
|
What does a white buoy with an orange cross within a diamond marked on
it indicate? |
An anchorage area |
Operating restrictions are in effect |
Vessels are excluded from the area |
Danger |
|
Which item in illustration D034NG below shows a fixed and flashing
light? |
A |
B |
C |
D |
|
Which would you expect to see on a lighted preferred-channel buoy? |
A
Morse (A) white light |
A
composite group-flashing light |
A
fixed red light |
A
yellow light |
|
You are outbound in a buoyed channel on course 015°T. You sight a white
light showing a Morse (A) characteristic bearing 359° relative. For
safety, which action should you take? |
Change course to 359°T to pass near to the buoy |
Check the chart to see where the marked danger lies in relation to the
buoy |
Stay in the channel and leave the buoy to port |
Alter course to 000°T and leave the buoy close on the starboard side |
|
A mid-channel buoy, may show which light? |
An occulting green light |
A
flashing red light |
A
fixed red light |
A
Morse (A) white light |
|
How is the draw span of a floating drawbridge marked? |
With three red lights on each side of the draw |
With a flashing blue lights |
With a yellow and white diamond |
With a yellow light showing Morse Code (B) |
|
In the U.S. Aids to Navigation System on the Western Rivers, the light
characteristic of group flashing (2) is used for which purpose? |
To indicate daymarks with no lateral significant |
To indicate the preferred channel |
To mark the right descending bank |
To mark the left descending bank |
|
The Light List indicates that a dayboard is a type KGW. You should take
which action? |
Pass it close aboard on either side |
Look for another daymark to form the range |
Leave it to port when southbound on the Atlantic Coast ICW |
Look for a green and white diamond |
|
What color lights do lighted information markers display? |
White lights |
Green lights |
Yellow lights |
Red lights |
|
When approaching a lock entrance, which flashing light is the visual
signal displayed when a single lock is ready for entrance? |
An amber light |
A
green light |
A
red light |
A
white light |
|
Where are buoys and day beacons exhibiting a yellow triangle or square
painted on them used? |
On isolated stretches of the ICW to mark undredged areas |
Locations where the ICW and other waterways coincide |
In minor harbors where the controlling depth is 10 feet (3 meters) or
less |
Only at particularly hazardous turns of the channel |
|
Which is TRUE concerning daymarks marking the starboard side of the
channel when going towards the sea? |
They will be red squares |
The will be green squares |
The will be green triangles |
They will be red triangles |
|
Which is TRUE concerning privately maintained aids to navigation
included in the Light List? |
They must be conspicuously marked by a signboard with the words "PRIVATE
AID" |
They must conform to the standards of the U.S. Aids to Navigation System |
Not permitted in or along first-class waterways and may be authorized
for second- and third- class waterways |
They are painted white and must use a white light if lighted |
|
Which is TRUE of a preferred-channel buoy? |
They may be lettered |
They are spherical |
They show a white light |
All of the above. |
|
Which is the term given to the time required for a lighted aid to
complete a full cycle of light changes? |
Set |
Frequency |
Function |
Period |
|
Entering from sea, how would a daymark on the port side of the channel
be indicated on a chart? |
A
red triangle with the letter R |
A
white triangle with the letters RG |
A
green square with the letter G |
A
white square with the letters GR |
|
In which situation is the light characteristic of composite group
flashing (2 + 1) used in the Aids to Navigation System on the Western
Rivers? |
Only to identify the right descending bank |
On daymarks with no lateral significance |
On preferred-channel buoys |
Only to identify the left descending bank |
|
Under the IALA Buoyage Systems, which is TRUE of the topmark of a red
and white vertically- striped buoy? |
It shall be X-shaped |
It shall be a single red cone |
It shall be a single red sphere |
It shall be two black spheres |
|
Under the IALA-B Buoyage System, which is TRUE of a conical buoy? |
The buoy is numbered with an odd number |
The buoy is red in color |
The buoy should be left to port when entering from seaward |
All of the above. |
|
Under the U.S. Aids to Navigation System, what does a lighted buoy with
a spherical topmark mark indicate? |
The position of underwater cables |
A
hazard to navigation |
Safe water |
The port side of the channel |
|
Under the U.S. Aids to Navigation System, which category is a yellow
buoy? |
A
safe water buoy |
A
special purpose mark |
A
junction buoy |
A
cardinal mark |
|
Which characteristic and color will a preferred-channel buoy show? |
A
group-occulting white light |
A
composite group-flashing (2 + 1) white light |
A
white light whose characteristic is Morse (A) |
A
composite group-flashing (2 + 1) red or green light |
|
Which characteristic will a lighted buoy that is to be left to
starboard, when entering a U.S. port from seaward have? |
A
light characteristic of Morse (A) |
A
white light |
A
red light |
A
green light |
|
Which characteristics will a lighted buoy that is to be left to
starboard, when entering a U.S. port from seaward have? |
A
light characteristic of Morse (A) |
A
white light |
A
red light |
A
green light |
|
On entering from seaward, which is TRUE of a starboard side daymark? |
It shows a fixed red light if lighted |
It show a Morse (A) white light |
It will be square in shape |
It will have an even number if numbered |
|
When entering from seaward, what does a buoy displaying a composite
group (2+1) flashing red light indicate? |
A
wreck to be left on the vessel's port side |
A
junction with the preferred channel to the left |
A
sharp turn in the preferred channel to the right |
The starboard side of the secondary channel |
|
Which is TRUE of a lateral system buoy displaying a quick flashing
light? |
The buoy should be passed close aboard on either side |
The buoy is painted with red and white vertical stripes |
The buoy is used at a channel bifurcation or junction |
The buoy indicates that special caution is required |
|
Which is TRUE of an alternating light? |
It marks an alternate lesser used channel |
It shows a light that changes color |
It is used as a replacement for another light |
It shows a light with varying lengths of the lighted period |
|
Which is a characteristic of a port side daymark? |
Black and white |
Numbered |
Of any shape |
Octagonal |
|
Which is TRUE of an occulting light? |
There is only a partial eclipse of the light |
The period of light exceeds the period of darkness |
The periods of light and darkness are equal |
The period of darkness exceeds the period of light |
|
Which would be the characteristic of an occulting light? |
4
sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse |
6
sec. flash, 6 sec. eclipse |
1
sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse |
5
sec. flash, 5 sec. eclipse |
|
A cardinal mark showing an uninterrupted quick-flashing white light
indicates the deepest water is located in which quadrant? |
The east quadrant of the mark |
The north quadrant of the mark |
The south quadrant of the mark |
The west quadrant of the mark |
|
In United States waters, a buoy having red and white vertical stripes if
lighted, it will have which light characteristic? |
Morse (A) |
Quick flashing |
Group occulting |
Interrupted quick flashing |
|
What is the characteristic of a quick flashing light? |
Shows not less than 60 flashes per minute |
Shows quick flashes for about 5 seconds followed by a 1 second dark
period |
Durations of light and darkness are equal |
Shows groups of 2 or more flashes at regular intervals |
|
Under the IALA-A Buoyage system, a buoy marking the port hand of the
channel when approaching from seaward may NOT have which feature? |
A
red light |
A
square topmark |
A
group-flashing light |
A
conical shape |
|
How are you informed of defects or changes in aids to navigation? |
Marine Safety Information Website |
Weekly Notice to Mariners |
Local Notice to Mariners |
All of the above. |
|
What does a white buoy with an orange rectangle on it indicate? |
Danger |
General information |
A
controlled area |
An exclusion area |
|
Which is TRUE of a nun buoy in the IALA Region B system of buoyage? |
It will be green in color |
It will be left to port when entering from seaward |
It will be cylindrical in shape |
It will have an even number |
|
Light List indicates that a light has a nominal range of 14 miles and is
42 feet high (12.8 meters). If the visibility is 6 miles and your height
of eye is 20 feet (6.1 meters), at what approximate distance will you
sight the light? |
20.1 miles
|
10.0 miles
|
7.6 miles
|
6.0 miles |
You are heading out to sea in a buoyed channel and see a quick-flashing
green light on a buoy ahead of you. In U.S. waters, you should leave the
buoy __________.
|
about 50 yards off on either side
|
to port
|
well clear on either side
|
to starboard |
|
A lateral system buoy displaying a quick light __________. |
indicates that special caution is required |
is used at a channel bifurcation or junction |
should be passed close aboard on either side |
is painted with red and white vertical stripes |
|
As you enter a channel from seaward in a U.S. port, the numbers on the
starboard side buoys __________. |
decrease and the buoys are red |
increase and the buoys are red |
increase and the buoys are green |
decrease and the buoys are black |
|
A lighted buoy to be left to starboard, when entering a U.S. port from
seaward, shall have a __________. |
green light |
white light |
red light |
light characteristic of Morse |
|
You are steaming southward along the west coast of the United States
when you encounter a buoy showing a flashing red light. Which is TRUE
concerning the buoy?__________. |
The buoy can remain on either side close aboard
|
The buoy should be left on the vessel's starboard side
|
The buoy can be on either side well clear
|
The buoy should be left on the vessel's port side |
|
You are steaming southward along the west coast of the United States
when you encounter a buoy showing a flashing red light. The buoy should
be left on __________. |
either side close aboard |
either side well clear |
the vessel's starboard side |
the vessel's port side |
|
As your vessel is heading southward along the east coast of the United
States, you encounter a buoy showing a red flashing light. How should
you pass this buoy? |
Leave it to your port. |
Pass it about 50 yards off on either side. |
Pass it well clear on either side. |
Leave it to your starboard. |
|
"Proceeding from seaward" for the purpose of the direction of buoying
offshore, lateral system buoys would be proceeding __________. |
northerly on the Atlantic Coast |
northerly on the Pacific Coast |
easterly on the Gulf Coast |
None of the above |
|
You are steaming in a westerly direction along the Gulf Coast. You see
ahead of you a lighted buoy showing a red isophase light. Which action
should you take? |
Alter course and leave the buoy near by on either side. |
Alter course to port and leave the buoy to starboard. |
Alter course to starboard and leave the buoy to port. |
Alter course and pass the buoy well-off on either side. |
|
You are steaming southward along the west coast of the United States
when you sight a buoy showing a flashing green light. How should you
pass this buoy? |
Leave it to your starboard. |
Leave it to your port. |
Pass it close aboard on either side. |
Pass it on either side but well clear of it. |
|
A nun buoy will __________. |
be left to port when entering from seaward |
be green in color |
have an even number |
be cylindrical in shape |
As you enter a U.S. channel from seaward the numbers on the buoys
__________.
|
increase with the can buoys being odd numbered
|
decrease with the can buoys being even numbered
|
increase in channels going to the north or west, and decrease in
channels going to the south or east
|
increase with the can buoys being even numbered |
|
A white buoy with an open-faced orange diamond on it indicates
__________. |
the buoy is a mooring buoy |
operating restrictions are in effect |
vessels are excluded from the area |
danger |
|
A white buoy with an orange circle marked on it indicates __________. |
danger |
operating restrictions are in effect |
vessels are excluded from the area |
a
mooring buoy |
|
A white buoy with an orange cross within a diamond marked on it
indicates __________. |
danger |
operating restrictions are in effect |
an anchorage area |
vessels are excluded from the area |
|
An orange and white buoy marking a danger area will have what symbol on
it? |
Diamond with a cross |
Open-faced diamond |
Square |
Circle |
|
An orange and white buoy marking an area where operating restrictions
are in effect will be marked with which symbol? |
Circle |
Open-faced diamond |
Diamond with a cross |
Rectangle |
|
An orange and white buoy indicating a vessel-exclusion area will be
marked with what symbol? |
Open-faced diamond |
Diamond with a cross |
Square |
Circle |
|
A white buoy with an orange rectangle on it is used to indicate
__________. |
a
controlled area |
general information |
danger |
an exclusion area |
|
An orange and white buoy with a rectangle on it displays __________. |
distances |
directions |
locations |
All of the above. |
|
A buoy marking a wreck will show a(n) __________. |
continuous quick white light and may be numbered |
white light FL (2) and a topmark of 2 black spheres |
occulting green light and may be lettered |
yellow light and will be numbered |
|
Buoys which mark isolated dangers are painted with alternating
__________. |
green and black bands |
green and white bands |
red and white stripes |
red and black bands |
|
Under the IALA-B Buoyage System, when entering from seaward a lateral
system buoy to be left to port may display which of the topmarks shown?
Illustration D046NG |
A |
B |
C |
D |
|
Under the IALA-B Buoyage System, when entering from seaward a lateral
system buoy to be left to starboard may display which of the topmarks
shown? Illustration D046NG |
A |
B |
C |
D |
|
What does a buoy with a composite group-flashing light indicate? |
Bifurcation (channel junction) |
Dredging area |
Fish net area |
dredging area |
|
A buoy having red and green horizontal bands would have a light
characteristic of __________. |
Morse |
quick flashing |
composite group flashing |
interrupted quick flashing |
|
A preferred-channel buoy will show a __________. |
white light whose characteristic is Morse |
composite group-flashing (2 + 1) red or green light |
composite group-flashing (2 + 1) white light |
group-occulting white light |
|
A lighted preferred-channel buoy may show a __________. |
fixed red light |
Morse (A) white light |
yellow light |
composite group-flashing light |
|
A preferred-channel buoy may be __________. |
lettered |
spherical |
showing a white light |
All of the above. |
|
While proceeding along the Mediterranean coast of Spain, you sight the
black and yellow buoy shown in illustration D020NG below. Your course is
039°T, and the buoy bears 053°T. What action should you take? |
Alter course towards the buoy and leave the buoy well clear on either
side
|
Maintain course and ensure that the bearings increase
|
Alter course to 060° and ensure that the bearings decrease
|
Alter course to 053°T and pass the buoy close aboard on either side |
|
While proceeding along the Norwegian coast on course 039°T, you sight
the black-yellow-black banded buoy shown in illustration D021NG below,
bearing 053°T. What action should you take? |
Alter course to 053° and leave the buoy close aboard on either side |
Alter course to port to rapidly open the bearing to the right |
Maintain course |
Alter course to 060° and ensure that the true bearings decreases |
|
Which cardinal quadrant is represented by the topmark in illustration
D024NG below? |
Southern |
Northern |
Eastern |
Western |
You are underway on course 127°T. You sight a buoy with the topmarks
shown in illustration D025NG below, bearing two points on the starboard
bow. Which action must be taken?
|
Ensure the bearings change to the right.
|
Alter course to starboard until the buoy is at least two points on the
port bow, then hold course.
|
Alter course to port until the buoy is broad on the starboard quarter,
then hold course.
|
Change course to have the buoy close aboard either side. |
|
On a voyage along the coast of France, you sight a buoy with the top
marks as shown in illustration D026NG below. How should you steer your
vessel? |
west of the buoy |
south of the buoy |
east of the buoy |
north of the buoy |
|
While steaming north of the Irish coast, you sight a buoy which shows
the light rhythm shown in illustration D028NG below. How would you pass
this buoy? |
South of the buoy |
West of the buoy |
North of the buoy |
East of the buoy |
|
During daylight hours black double-cone topmarks are the most important
feature of cardinal marks. Which of the four topmarks shown in
illustration D030NG below indicates the best navigable water lies to the
west of the buoy? |
A |
B |
C |
D |
|
In the North Sea area, you sight a buoy showing a quick white light with
6 flashes, followed by one long flash at 15 second intervals. Which of
the four topmarks shown in illustration D030NG below would be fitted to
this buoy? |
A |
B |
C |
D |
In the North Sea area, you sight a buoy showing a quick white light with
9 flashes every 15 seconds. Which of the four topmarks shown in
illustration D030NG below would be fitted to the buoy?
|
A |
B
|
C |
D |
|
In the North Sea area, you sight a buoy with a quick light showing 3
flashes every 10 seconds. Which topmark in illustration D030NG below
would be fitted to this buoy under the IALA Buoyage Systems? |
A |
B |
C |
D |
|
In the North Sea area, you sight a buoy showing an uninterrupted
quick-flashing white light. Which of the four topmarks shown in
illustration D031NG below will this buoy be fitted with under the IALA
Buoyage system? |
A |
B |
C |
D |
|
In the North Sea area, you sight a buoy showing a quick white light with
9 flashes every 15 seconds. Which of the four topmarks shown in
illustration D031NG below would be fitted to the buoy? |
A |
B |
C |
D |
|
In the North Sea area, you sight a buoy showing a quick white light
showing 6 flashes followed by one long flash at 15 second intervals.
Which of the four topmarks in illustration D031NG below would be fitted
to this buoy? |
A |
B |
C |
D |
|
While preparing to enter a Brazilian port (IALA-B), you see ahead a red
and green horizontally striped buoy. The upper band is red. What action
should you take? |
Pass the buoy close aboard on either side. |
Pass the buoy well clear on either side. |
Alter course to leave the buoy to port. |
Alter course to leave the buoy to starboard. |
|
In illustration D044NG below, a pillar buoy is indicated by which
letter? |
A |
B |
C |
D |
|
In illustration D044NG below, what type of buoy is indicated by the
letter A? |
pillar |
can |
spar |
nun |
|
In illustration D044NG below, what type of buoy is indicated by the
letter D? |
spar |
can |
pillar |
nun |
|
In which country would you expect the channels to be marked with the
IALA-B Buoyage System? |
Saudi Arabia |
Peru |
Poland |
Morocco |
|
In which country would you expect the channels to be marked with the
IALA-B Buoyage System? |
Brazil |
Norway |
New Zealand |
Tanzania |
|
If you observe a buoy off station you should __________. |
fill out and mail CG Form 2692 to the nearest Coast Guard office |
appear in person at the nearest Coast Guard office |
notify Coast Guard Headquarters in Washington, DC |
immediately contact the nearest Coast Guard office by radiotelephone |
|
You are in a buoyed channel at night and pass a lighted buoy with an
irregular characteristic. You should report this to the __________. |
National Ocean Service |
harbor master |
Coast Guard |
Corps of Engineers |
The IALA Buoyage Systems do NOT apply to __________.
|
areas in which navigation may be subject to regulation
|
natural dangers and other obstructions, such as wrecks
|
lighthouses and lightships |
the sides and centerlines of navigable channels |
|
Lighted information markers show __________. |
white lights |
green lights |
yellow lights |
red lights |
|
The Coast Guard Captain of the Port has excluded all traffic from a
section of a port, while a regatta is taking place. The buoys marking
this exclusion area will be __________. |
orange and white |
nun- or can-shaped to conform to the overall direction o |
marked with a spherical topmark |
yellow |
|
Navigational marks used for informational or regulatory purposes are
__________. |
white with orange geometric shapes |
solid yellow |
green and red horizontally-banded |
red and white vertically-striped |
|
White and orange buoys, if lighted, show which color light? |
Orange |
White |
Red |
Alternating yellow and white |
|
Information markers, when lighted, will display __________. |
red lights |
green lights |
white lights |
yellow lights |
|
White lights may be found on __________. |
special purpose buoys |
numbered buoys |
preferred channel buoys |
information and regulatory buoys |
|
Lighted white and orange buoys must show which color light? |
White |
Orange |
Red |
Alternating yellow and white |
|
Under the Uniform State Waterway Marking System a mooring buoy is
painted __________. |
white with a blue band |
any color that does not conflict with the lateral system |
yellow |
white with a green top |
|
A white buoy with a blue band is __________. |
a
mooring buoy |
marking a restricted area |
an isolated danger mark |
a
hydrographic data collection buoy |
|
A mooring buoy, if lighted, shows which color light? |
Blue |
White |
Yellow |
Any color except red or green |
|
You sight a spar buoy with the top mark shown in illustration D027NG
below. You must take which of the following actions? |
pass to the east of the buoy |
pass to the south of the buoy |
pass to the north of the buoy |
keep well clear of the buoy and pass on either side |
|
Which topmark shown in illustration D023NG below identifies an isolated
danger? |
A |
B |
C |
D |
|
You sight a buoy fitted with a double-sphere topmark. If sighted at
night, this buoy would show a __________. |
quick-flashing green light |
quick-flashing red light |
flashing white light showing a group of two flashes |
flashing red light showing a group of three flashes |
|
What is the light phase characteristic of a lighted isolated-danger
mark? |
Very quick flashing |
Interrupted quick flashing |
Long flashing |
Group flashing |
|
Buoys which only mark the left or right side of the channel will never
exhibit a light with which characteristic? |
Equal interval (isophase) |
Quick flashing |
Composite group flashing |
Flashing |
|
In the U.S. Aids to Navigation System, lateral aids as seen entering
from seaward will display lights with which characteristic? |
Quick Flashing |
Flashing |
Occulting |
All of the above. |
|
Unlighted, red and green, horizontally-banded buoys with the topmost
band red ________ |
may either be cylindrical or conical since the shape has no significance
|
are conical in shape and called nun buo |
are cylindrical in shape and called can buo |
are triangular in shape to indicate that it may not be possible to pass
on either side of the buoy |
|
Which buoy is NOT numbered? |
Green gong buoy |
Green can buoy |
Red lighted buoy |
Preferred-channel buoy |
|
Which buoy will NOT display white retro reflective material? |
Safe water mark |
Preferred channel mark |
Isolated danger mark |
Daymark of no lateral significance |
|
When approaching a preferred-channel buoy, the best channel is NOT
indicated by the __________. |
color of the uppermost band |
light characteristic |
shape of an unlighted buoy |
color of the light |
When a buoy marks a channel bifurcation, the preferred channel is NOT
indicated by __________.
|
the light color of a lighted buoy
|
the shape of an unlighted buoy
|
whether the number is odd or even |
the color of the topmost band |
|
Preferred channel buoys indicate the preferred channel to transit by
__________. |
odd or even numbers |
the color of their top band |
the buoy's light rhythms |
the location of the buoy in the channel junction |
|
In the U.S. Aids to Navigation System, red and green horizontally-banded
buoys mark __________. |
fishing grounds |
general anchorage areas |
junctions or bifurcations |
channels for shallow draft vessels |
|
Red lights may appear on __________. |
vertically striped buoys |
yellow buoys |
spherical buoys |
horizontally banded buoys |
Green lights may appear on __________.
|
horizontally banded buoys
|
spherical buoys
|
vertically striped buoys
|
yellow buoys |
|
Your vessel is leaving New York harbor in dense fog. As the vessel
slowly proceeds toward sea, you sight a green can buoy on the starboard
bow. Which action should you take? |
Turn hard right to get back into the channel. |
Stand on, leaving the buoy to your starboard. |
Pass the buoy close to, leaving it to your port. |
Stop and fix your position. |
|
When entering from seaward, a buoy displaying a composite group (2+1)
flashing red light indicates __________. |
the starboard side of the secondary channel |
a
junction with the preferred channel to the left |
a
wreck to be left on the vessel's port side |
a
sharp turn in the preferred channel to the right |
|
When entering from seaward, a buoy displaying a single-flashing red
light indicates __________. |
a
wreck to be left on the vessel's port side |
a
sharp turn in the channel to the right |
a
junction with the preferred channel to the left |
the starboard side of the channel |
|
When entering from seaward, a buoy displaying a single-flashing red
light indicates __________. |
the starboard side of the channel |
a
sharp turn in the channel to the right |
a
junction with the preferred channel to the left |
a
wreck to be left on the vessel's port side |
|
When outbound from a U.S. port, a buoy displaying a flashing red light
indicates __________. |
a
sharp turn in the channel to the right |
a
junction with the preferred channel to the left |
the port side of the channel |
a
wreck to be left on the vessel's starboard side |
|
Which buoy may be even numbered? |
Unlighted nun buoy |
Lighted green buoy |
Mid-channel buoy |
All of the above. |
|
Which buoy may be odd numbered? |
A
yellow buoy |
A
red buoy |
A
spherical buoy |
An unlighted can buoy |
|
Which buoy may be odd numbered? |
Unlighted nun buoy |
Lighted green buoy |
Mid-channel buoy |
All of the above. |
|
When entering a channel from seaward, the numbers on buoys __________. |
increase with the even numbers to starboard |
decrease with the odd numbers to starboard |
are marked in 6 inch figures with retroreflective material |
are the same as their Light List number |
What indicates a buoy that should be left to port when entering from
seaward?
(U.S. Aids to Navigation System) |
Odd number |
White light |
Group flashing characteristic |
Nun shape |
|
Buoys are marked with reflective material to assist in their detection
by searchlight. Which statement is TRUE? |
A
safe-water buoy will display red and white vertical stripes of
reflective material.
|
A
preferred-channel buoy displays either red or green reflective material
to agree with the top band of color.
|
A
special-purpose mark will display either red or green reflective
material to agree with its shape.
|
All reflective material is white because it is the most visible at
night. |
|
In the IALA Buoyage System, what are buoys with alternating red and
green horizontal bands used to indicate? |
spoil grounds |
fishing areas |
the preferred channel |
isolated dangers |
|
In the IALA Buoyage System, preferred-channel-to-port or
preferred-channel-to starboard buoys, when fitted with lights, will show
a __________. |
long flashing light |
quick flashing light |
group flashing |
composite group flashing (2 + 1) light |
|
Under the IALA-B Buoyage System, a buoy displaying a red light will
__________. |
show a light characteristic of Morse Code "A" |
have a radar reflector |
be left to starboard when entering from seaward |
be lettered |
|
Under the IALA-B Buoyage System, a conical buoy will be __________. |
red in color |
numbered with an odd number |
left to port when entering from seaward |
All of the above. |
|
Under the IALA-B Buoyage System, when entering from seaward, a buoy that
should be left to port will be __________. |
yellow |
green |
black |
red |
While steaming on course 280°T, you sight a buoy showing a very
quick-flashing (VQ) white light well to port. Maintaining course, you
sight another buoy showing a quick-flashing (Q) white light. You should
pass __________.
|
south of the buoy
|
east of the buoy
|
west of the buoy
|
north of the buoy |
You are underway on course 142°T when you sight a buoy bearing 105°T.
The buoy's white light has a characteristic of continuous very-quick
flashing. To ensure that your vessel remains in the best navigable water
you would __________.
|
alter course to port and pass the buoy close aboard to either side
|
continue on course and ensure that the bearings change to the left |
pass between the buoy and another buoy showing a fixed white light
|
alter course to port and pass north of the buoy |
|
You are underway in the North Sea on course 216°T when you sight a buoy
bearing 021° relative. Under the IALA Buoyage System, you are in the
best navigable water if the buoy __________. |
has a continuous very quick light |
has a double cone topmark with both points up |
is horizontally banded yellow, black, yellow |
has a light characteristic of Q(6) + L Fl 15s |
|
You are underway on course 328°T when you sight a buoy broad on your
port bow. You are in the best navigable water if the buoy __________. |
exhibits a light with the characteristic of VQ(3)5s |
is a western quadrant buoy |
is painted yellow on the top half and black on the bottom |
has a topmark of two cones with points down |
|
The characteristic of a lighted cardinal mark may be __________. |
occulting |
very quick flashing |
fixed |
flashing |
|
What is a characteristic of cardinal marks? |
Light rhythms indicating directional orientation |
Square or triangular topmarks |
Vertical stripes |
Number-letter combinations for identification |
You are on course 090°T when you sight a flashing white light with a
characteristic of VQ(9)10s. You immediately change course to 030°T.
After one hour, you sight another flashing white light with the
characteristic of VQ. You must pass well __________.
|
south of this buoy
|
east of this buoy
|
west of this buoy
|
north of this buoy |
What is NOT a characteristic of cardinal marks?
|
White lights
|
Directional orientation to a hazard
|
Yellow and black bands
|
Square or triangular topmarks |
|
Two navigational hazards are located near to each other, but each is
marked by an individual cardinal buoyage system. The buoys of one
cardinal system may be identified from the other system by __________. |
the difference in the periods of the light |
the differing light colors |
one system using horizontal bands while the other system uses vertical
stripes |
one system having odd numbers while the other system has even numbers |
|
You are steaming along the coast of Ireland in the Irish Sea. You sight
a lighted buoy with a white flashing light showing a group of two
flashes. The buoy indicates you __________. |
must pass the buoy close to starboard |
must pass south of the buoy |
must pass north of the buoy |
should pass well clear on either side of the buoy |
Under the IALA Buoyage Systems, a cardinal mark may NOT be used to
__________.
|
indicate the port and starboard sides of well-defined channels
|
indicate the safe side on which to pass a danger
|
indicate that the deepest water in an area is on the named side of the
mark
|
draw attention to a feature in the channel such as a bend, junction,
bifurcation, or end of a shoal |
|
In waters where the cardinal system is used you would expect to find
danger __________. |
lying to the east of an eastern quadrant buoy |
lying to the south of an eastern quadrant buoy |
beneath or directly adjacent to the buoy |
lying to the south of a northern quadrant buoy |
|
A cardinal mark showing an uninterrupted quick-flashing white light
indicates the deepest water in the area is on the __________. |
south side of the mark |
north side of the mark |
east side of the mark |
west side of the mark |
|
Under the IALA cardinal system, a mark with a quick white light showing
6 flashes followed by one long flash indicates that the safest water is
on the __________. |
north side of the mark |
south side of the mark |
east side of the mark |
west side of the mark |
|
Under the IALA cardinal system, a mark with quick white light showing 3
flashes every 10 seconds indicates that the safest water in the area is
on the __________. |
east side of the mark |
west side of the mark |
north side of the mark |
south side of the mark |
|
Under the IALA cardinal system, a mark with a quick light showing 9
flashes every 15 seconds indicates that the safest water is on the
__________. |
west side of the mark |
east side of the mark |
south side of the mark |
north side of the mark |
|
On approaching the English Channel on course 080°T, you note the symbol
YBY near a charted buoy. You must pass __________. |
southward of the buoy |
eastward of the buoy |
westward of the buoy |
northward of the buoy |
|
Under the IALA-A Buoyage System, when entering from seaward a lateral
system buoy to be left to starboard may display which topmark shown in
illustration D046NG below? |
A |
B |
C |
D |
|
Under the IALA-A Buoyage System, when entering from seaward a lateral
system buoy to be left to port may display which topmark shown?
Illustration D046NG |
A |
B |
C |
D |
|
You are entering an African port and see ahead of you a red can-shaped
buoy. What action should you take? |
Pass the buoy close aboard on either side |
Alter course to leave the buoy to starboard |
Pass the buoy well clear on either side |
Alter course to leave the buoy to port |
|
Under the IALA-A Buoyage System, a green spar buoy with a triangular
topmark would indicate that the buoy __________. |
is on the north side of a point of interest |
may be left close aboard on either side |
should be left to port when heading out to sea |
is marking the preferred channel |
|
Under the IALA - A Buoyage System, a buoy used as a port hand mark would
not show which light characteristic? |
Long flashing |
Isophase |
Quick flashing |
Group Flashing (2 + 1) |
|
Under the IALA-A Buoyage system, a buoy marking the starboard side of
the channel when approaching from seaward may have a __________. |
red light |
can shape |
triangular topmark |
isophase light |
|
IN REGION A of the IALA Buoyage System, when entering from seaward, the
starboard side of a channel would be marked by a __________. |
green can buoy |
red conical buoy |
green conical buoy |
red can buoy |
|
Under the IALA-A Buoyage system, a buoy marking the port hand of the
channel when approaching from seaward may NOT have a __________. |
red light |
group-flashing light |
square topmark |
conical shape |
|
Under the IALA-A Buoyage System, a buoy indicating the preferred channel
is to port would have __________. |
an odd number |
a
pillar shape |
an even number |
horizontal bands |
|
Under the IALA-A Buoyage System, a buoy indicating that the preferred
channel is to port when entering from seaward, can have a __________. |
can shape |
group-flashing (2) light |
red-and-green vertical stripes |
green light |
|
In Region A of the IALA Buoyage System, when entering from seaward, the
port side of a channel would be marked by a __________. |
black conical buoy |
red can buoy |
black can buoy |
red conical buoy |
|
Where would you expect to find channels marked with the IALA-A Buoyage
System? |
Chile |
Australia |
the Philippines |
Republic of Korea |
|
Where would you expect to find channels marked with the IALA-A Buoyage
System? |
Canada |
Argentina |
India |
Japan |
|
Under the IALA-A Buoyage System, when entering from seaward, a buoy
indicating the preferred channel is to starboard may have a __________. |
conical shape |
square topmark |
green light |
long-flashing light characteristic |
|
A safe water mark may be __________. |
vertically striped |
showing a white light |
spherical |
All of the above. |
|
A vertically-striped buoy may be __________. |
lighted with a white light |
striped black and green |
striped black and yellow |
lighted with a red light |
|
A mid-channel buoy, if lighted, will show a __________. |
Morse |
white light |
flashing red light |
fixed red light |
|
A spherical buoy may be __________. |
numbered |
green |
red |
lettered |
|
Of the four light characteristics shown in illustration D019NG below
which one does NOT represent a safe water mark of the IALA Buoyage
System? |
A |
B |
C |
D |
|
Under the IALA Buoyage System, which topmark shown in illustration
D023NG below will be displayed on a safe water mark? |
A |
B |
C |
D |
|
Safe water buoys may show ONLY __________. |
flashing green lights |
yellow lights |
white lights |
flashing red lights |
How is a safe water mark, that can be passed close aboard on either
side, painted and lighted?
|
Black and red stripes with a Morse (A) light |
Black and red stripes with an interrupted quick flashing light
|
Black and white stripes with an interrupted quick flashing light
|
Red and white stripes with a Morse (A) light
|
|
The light rhythm of Morse (A) is shown on __________. |
starboard- or port-side buoys
|
special marks
|
safe water buoys
|
preferred-channel buoys |
|
In United States waters, a buoy having red and white vertical stripes
has a light characteristic of __________. |
group occulting |
interrupted quick flashing |
quick flashing |
Morse (A) |
|
Which navigational mark may only be lettered? |
An unlighted, green, can buoy |
A
spherical buoy |
A
red buoy |
A
port side day-shape |
|
What is a lighted safe water mark fitted with to aid in its
identification? |
A
spherical topmark |
Red and white retroreflective material |
A
red and white octagon |
A
sequential number |
What is a lighted safe water mark fitted with to aid in its
identification?
|
A
red and white octagon
|
Red and white retroreflective material
|
A
sequential number
|
A
spherical topmark |
|
Under the U.S. Aids to Navigation System, a lighted buoy with a
spherical topmark marks __________. |
safe water |
the position of underwater cables |
a
hazard to navigation |
the port side of the channel |
|
You are outbound in a buoyed channel on course 015°T. You sight a white
light showing a Morse characteristic bearing 359° relative. For safety,
you should __________. |
alter course to 000°T and leave the buoy well clear to starboard |
check the chart to see where the marked danger lies in relation to the
buoy |
stay in the channel and leave the buoy to port |
change course to 359°T to pass near to the buoy |
|
Under the IALA Buoyage Systems, safe water marks may show a __________. |
composite group-flashing, Fl(2 + 1), green light |
white Morse (A) light |
quick-flashing, Q(9)15s, white light |
composite group-flashing, Fl(2 + 1), red light |
|
In the IALA Maritime Buoyage System, what is a red and white
vertically-striped buoy used to indicate? |
cardinal mark |
safe water mark |
special mark not primarily used for navigation |
isolated danger mark |
|
Under the IALA-A and B Buoyage Systems, a buoy with alternating red and
white vertical stripes indicates __________. |
that the preferred channel is to port |
that the preferred channel is to starboard |
that there is navigable water all around |
an isolated danger exists |
Under the IALA Buoyage Systems, a safe water mark may NOT __________.
|
show a quick flashing light |
be lettered |
display a white light |
be spherical |
Under the IALA Buoyage Systems, a spherical buoy will mark the
__________.
|
safe water |
port side of the channel |
a
hazard to navigation |
the position of an underwater cable |
|
Under the IALA Buoyage Systems, the topmark of a red and white
vertically-striped buoy shall be __________. |
two black spheres |
a
single red sphere |
X-shaped |
a
single red cone |
A special mark (yellow buoy), if lighted, may exhibit which light
rhythm?
|
Morse "A"
|
Equal interval
|
Flashing |
Occulting |
|
A special purpose buoy shall be __________. |
striped black and red |
lighted with a red light |
yellow |
lighted with a white light |
|
A survey (special purpose mark) buoy __________. |
may have a flashing red light |
must be lighted |
may have a fixed white light |
None of the above |
|
Buoys which mark dredging areas are painted __________. |
red |
yellow |
green |
black |
|
In both regions of the IALA buoyage system, which topmark shown in
illustration D022NG below is used on a special mark? |
A |
B |
C |
D |
|
Under the U.S. Aids to Navigation System, a special mark possesses which
of the following characteristics? |
May show a light with the Morse code "A" rhythm |
Must be lighted with a fixed or flashing white light |
May show a yellow light with a flashing rhythm |
Must be lighted with a yellow isophase light |
|
Which light characteristic may be used on a special purpose mark? |
Occulting |
Equal interval |
Fixed |
Quick flashing |
|
Which light characteristic may be used on a special purpose mark? |
Occulting |
Equal interval |
Flashing |
Quick flashing |
|
Which of the buoys listed below could be used to mark an anchorage? |
White buoy numbered "3" |
Yellow buoy lettered "N" |
White buoy with a green top |
White buoy with orange bands |
|
Under the U.S. Aids to Navigation System, a yellow buoy is a __________. |
junction buoy |
safe water buoy |
cardinal mark |
special purpose mark |
|
You have been informed that dredging operations may be underway in your
vicinity. Which buoy indicates the dredging area? |
Yellow and black vertically-striped buoy |
White and international orange buoy |
White buoy with a green top |
Yellow buoy |
|
Spoil grounds, anchorage areas, cable areas, and military exercise areas
are all marked by yellow buoys. Which special mark on the buoy will
indicate the specific area you are in? |
A
topmark spherical in shape |
A
topmark consisting of two cones with the points up |
A
topmark triangular in shape |
Lettering on the buoy |
|
Yellow lights may appear on __________. |
spherical buoys |
vertically-striped buoys |
special purpose buoys |
horizontally-banded buoys |
|
Under the IALA Buoyage Systems, a yellow buoy may mark __________. |
military exercise zones |
spoil areas |
fish net areas |
All of the above. |
|
In the U.S. Aids to Navigation System on the Western Rivers, the light
characteristic of group flashing (2) is used for lights on __________. |
preferred channel buoys |
the right descending bank |
the left descending bank |
daymarks with no lateral significant |
|
The light characteristic of flashing is used in the Aids to Navigation
System on the Western Rivers for lights on __________. |
the right descending bank |
daymarks with no lateral significance |
preferred channel buoys |
the left descending bank |
|
The light characteristic of composite group flashing (2 + 1) is used in
the Aids to Navigation System on the Western Rivers for lights on
__________. |
daymarks with no lateral significance |
the right descending bank |
the left descending bank |
preferred-channel buoys |
|
Under the U.S. Aids to Navigation System used on the Western Rivers,
aids to navigation lights on the right descending bank show __________. |
white or red lights |
white or green lights |
green lights only |
white lights only |
|
If your vessel were proceeding up river (ascending), the port side of
the channel would be marked according to the U. S. Aids to Navigation
System on the Western Rivers by __________. |
red can buoys |
green nun buoys |
red nun buoys |
green can buoys |
|
Under the U.S. Aids to Navigation System on the Western Rivers, the
buoys marking the starboard side of the channel when going upstream will
be __________. |
yellow |
green |
black |
red |
|
In the U.S. Aids to Navigation System on the Western Rivers, a preferred
channel buoy to be left to port while proceeding downstream will
__________. |
have a characteristic of composite group flashing if lighted |
show a red light if lighted |
have the upper band red |
All of the above. |
|
Under the U.S. Aids to Navigation System on the Western Rivers, a
preferred-channel buoy is __________. |
solid green |
vertically-striped red and white |
horizontally-banded red and green |
solid red |
|
You are in a channel inbound from sea. A daymark used to mark a channel
junction, when the preferred channel is to port will have the shape
indicated by what letter in illustration D045NG below? |
A |
B |
C |
D |
|
In illustration D045NG below, a green-and-red banded daymark, with the
uppermost band green, will have which of the following shapes? |
A |
B |
C |
D |
|
You are in a channel inbound from sea. A daymark used to mark a channel
junction when the preferred channel is to starboard will have the shape
indicated by what letter in illustration D045NG below? |
A |
B |
C |
D |
|
A daymark used to indicate the starboard side of the channel when
approaching from seaward will have the shape indicated by what letter in
illustration D045NG below? |
A |
B |
C |
D |
|
A triangular daymark would be colored __________. |
green |
red and white |
red |
green and white |
|
A red triangular daymark marks __________. |
an area of a channel where passing another vessel is permitted |
the starboard side of a channel |
a
prominent object of navigational interest that has no lateral
significance |
the centerline of a navigable channel |
|
What feature(s) of a daymark is (are) used to identify the beacon upon
which it is mounted? |
Color and shape |
Method of construction |
Size |
Signal characteristics |
|
In illustration D045NG below, what two shapes shown are used to indicate
a preferred channel? |
A
and B
|
C
and D
|
B
and C
|
A
and D |
|
In illustration D045NG below, which shape is a daymark warning of
danger? |
A |
B |
C |
D |
|
A daymark used as a special mark is indicated by which letter in
illustration D045NG below? |
A |
B |
C |
D |
|
A white diamond daymark with an orange border is a(n) __________. |
information or regulatory mark |
lateral aid on the intracoastal waterway |
safe water mark |
special mark |
|
The Light List indicates that a dayboard is a type KGW. You should
__________. |
look for another daymark to form the range |
see a green and white diamond |
pass it close aboard on either side |
leave it to port when southbound on the Atlantic Coast ICW |
|
The Light List indicates that a dayboard is a type MR. You should
__________. |
look for an all red daymark |
leave it on either side |
check to enter the correct channel at this junction daymark |
look for the other dayboard forming the range |
|
The Light List indicates that a dayboard is a type NB. You should
__________. |
check to enter the correct channel at the junction daymark |
expect a daymark of no lateral significance |
look for another daymark forming a range |
see a black triangle |
|
A daymark used to indicate the safe water in a channel will have which
of the shapes shown in illustration D045NG below? |
A |
B |
C |
D |
|
A safe water daymark has what shape? |
Triangular |
Diamond |
Octagonal |
Circular |
|
A special daymark is a __________. |
yellow diamond |
green square |
red-and-white octagon |
daymark with a yellow stripe on it |
|
The Light List indicates that a dayboard is a type TR-SY. You should
__________. |
expect a daymark with no lateral significance |
leave it to port when southbound on the Atlantic portions of the ICW |
look for a dayboard of type TR-TY to form a range |
pass it close aboard on either side |
|
On entering from seaward, a starboard side daymark will __________. |
have an even number if numbered |
be square in shape |
show a fixed red light if
lighted |
show a Morse (A) white light |
|
Entering from seaward, triangular-shaped daymarks are used to mark
__________. |
the centerline of the channel |
special purpose areas |
the starboard side of the channel |
an obstruction where the preferred channel is to starboard |
|
Daymarks marking the starboard side of the channel when going towards
the sea are __________. |
red squares |
green squares |
red triangles |
green triangles |
|
Port side daymarks may be __________. |
black and white |
numbered |
of any shape |
octagonal |
|
Which type of daymark is used to mark the port side of the channel when
entering from sea? |
Black and white diamond |
Red and white octagon |
Red triangle |
Green square |
|
Which type of daymark is used to mark the starboard side of the channel
when entering from sea? |
Red and white octagon |
Black and white diamond |
Red triangle |
Green square |
What are the colors of a mid-channel daymark?
|
Green and white
|
Black and red
|
Green and red
|
Red and white |
|
What daymark has NO lateral significance? |
Green square |
Green and white diamond |
Red triangle with a green horizontal stripe |
Red triangle |
|
Which daymark has no lateral significance? |
Red triangle |
Square; top half green and bottom half red |
Green square |
Black and white diamond |
|
What daymark shape is used in the lateral system? |
Pentagon |
Semicircle |
Triangle |
Diamond |
|
Under the U.S. Aids to Navigation System on the Western Rivers, a
daymark on the right descending bank will __________. |
indicate the gage reading |
be green |
have an odd number |
have yellow retroreflective markings |
|
Under the U.S. Aids to Navigation System on the Western Rivers, passing
daymarks on the right descending bank are __________. |
green square-shaped panels with green reflector borders |
red diamond-shaped panels with red reflector borders |
green triangular-shaped panels with green reflector borders |
red triangular-shaped panels with red reflector borders |
|
If your vessel were proceeding down river (descending), a green square
marker with a green reflector border on the right bank would be a
__________. |
crossing daymark |
dredging mark |
mile board |
passing daymark |
|
While proceeding downriver (descending) you sight a red diamond-shaped
panel with small, red reflector squares in each corner on the left bank.
Under the U.S. Aids to Navigation System on the Western Rivers this is a
__________. |
passing daymark
|
cable crossing
|
special purpose signal
|
crossing daymark |
|
Under the U.S. Aids to Navigation System on the Western Rivers, passing
daymarks on the left descending bank are __________. |
green squares |
green diamonds |
red triangles |
red diamonds |
|
While proceeding downriver, you sight a red triangular-shaped daymark on
the left bank. Under the U.S. Aids to Navigation System on the Western
Rivers this is a __________. |
special purpose signal |
passing daymark |
mark with no lateral significance |
crossing daymark |
|
What indicates a dual purpose buoy? |
Green buoy with a yellow square |
Red buoy with a horizontal yellow band |
Red and white vertically-striped buoy with a red spherical topmark |
Red and white vertically-striped buoy with a vertical yellow stripe |
|
You are entering an east coast port and see a buoy with a yellow
triangle painted on it. What does the symbol indicate? |
you are in the vicinity of the ICW |
the buoy designates a sharp turn in the channel |
the buoy is off station |
the buoy is a special mark |
|
A green buoy has a yellow triangle on it. This is a(n) __________. |
buoy that was set in error and will be replaced with a red nun buoy |
buoy that is off-station and is marked to warn mariners of its wrong
position |
information or regulatory buoy that has lateral significance |
dual purpose marking used where the ICW and other waterways coincide |
|
Buoys and day beacons exhibiting a yellow triangle or square painted on
them are used __________. |
at particularly hazardous turns of the channel |
where the ICW and other waterways coincide |
on isolated stretches of the ICW to mark undredged areas |
in minor harbors where the controlling depth is 10 feet (3 meters) or
less |
When a dual purpose marking is used, the mariner following the
Intracoastal Waterway should be guided by the __________.
|
color of the aid |
shape of the aid |
shape of the yellow mark |
color of the top band |
|
You are sailing south on the Intracoastal Waterway (ICW) when you sight
a red nun buoy with a yellow square painted on it. Which of the
following is TRUE? |
This buoy marks the end of the ICW in that geographic area.
|
You should leave the buoy on your port hand.
|
The yellow is retro reflective material used to assist in sighting the
buoy at night.
|
The yellow square is in error and it should be a yellow triangle. |
You are sailing south on the Intracoastal Waterway (ICW) when you sight
a red nun buoy with a yellow triangle painted on it. Which statement is
TRUE?
|
The yellow triangle identifies a sharp turn (over 60°) in the channel.
|
Geometric symbols such as squares and triangles replace letters and
numbers on ICW aids to navigation.
|
The ICW and another waterway coincide in this geographical area. |
This is an information or regulatory buoy that also has lateral
significance. |
You are sailing south on the Intracoastal Waterway (ICW) when you sight
a red nun buoy with a yellow square painted on it. Which statement is
TRUE?
|
The waterway in that area has shoaled and the available depth of water
is less than the project depth.
|
The buoy is off station and should be ignored as a navigational mark.
|
You should leave the buoy to port. |
ICW traffic should not proceed beyond the buoy unless the crossing
waterway is clear of all traffic. |
|
You are sailing south on the Intracoastal Waterway (ICW) when you sight
a green can buoy with a yellow square painted on it. Which of the
following is TRUE? |
You should pass the buoy close aboard on either side. |
The yellow square is retro reflective material used to assist in
sighting the buoy at night. |
You should leave the buoy to port. |
The buoy marks the end of the ICW in that area. |
|
Aids to navigation marking the intracoastal waterway can be identified
by __________. |
white retro reflective material |
the light characteristic and color for lighted aids |
yellow stripes, squares, or triangles marked on them |
the letters ICW after the aid's number or letter |
|
What is the approximate geographic range of Fenwick Island Light,
Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to
"Reprints from the LIGHT LISTS AND COAST PILOTS". |
13.1 nm |
10.3 nm |
18.3 nm |
15.4 nm |
Determine the approximate geographic visibility of an object, with a
height above the water of 85 feet (25.9 meters), for an observer with a
height of eye of 60 feet (18.3 meters).
|
20.8 nm
|
21.5 nm
|
18.4 nm
|
19.9 nm |
|
A mountain peak charted at 700 feet breaks the horizon, and your height
of eye is 12 feet. What is your approximate distance off (choose closest
answer)? |
34.7 nm |
40.3 nm |
55.3 nm |
61.6 nm |
|
What is the approximate geographic range of Horton Point Light, NY, if
your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the
LIGHT LISTS AND COAST PILOTS". |
18.8 nm |
19.3 nm |
20.3 nm |
24.8 nm |
|
What is the approximate geographic range of Assateague Light, VA, if
your height of eye is 52 feet (15.8 meters)? Refer to "Reprints from the
LIGHT LISTS AND COAST PILOTS". |
14.1 nm |
21.8 nm |
23.0 nm |
50.2 nm |
|
Your height of eye is 40 feet (12.2 meters). What is the approximate
geographical distance at which Ambrose Light, NY, could be visible?
Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS". |
22.8 nm |
18.3 nm |
21.0 nm |
19.5 nm |
|
What is the approximate geographic range of Race Rock Light, NY, if your
height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT
LISTS AND COAST PILOTS". |
17.4 nm |
9.9 nm |
15.7 nm |
14.3 nm |
|
What is the approximate geographic range of Fenwick Island Light,
Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to
"Reprints from the LIGHT LISTS AND COAST PILOTS". |
24.8 nm |
17.8 nm |
15.9 nm |
10.3 nm |
|
What is the approximate geographic range of Point Judith Light, Rhode
Island, if your height of eye is 62 feet (18.9 meters)? Refer to
"Reprints from the LIGHT LISTS AND COAST PILOTS". (use charted range of
20 miles as nominal range) |
9.6 nm |
16.5 nm |
18.6 nm |
20.7 nm |
|
What is the approximate geographic range of Shinnecock Light, NY, if
your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the
LIGHT LISTS AND COAST PILOTS". |
8.7 nm |
9.9 nm |
14.4 nm |
15.9 nm |
|
What is the approximate geographic range of Southwest Ledge Light,
Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to
"Reprints from the LIGHT LISTS AND COAST PILOTS". |
15.5 nm |
13.4 nm |
8.7 nm |
6.9 nm |
Geographic range is the maximum distance at which a light may be seen
under __________.
|
existing visibility conditions, limited only by the intensity of the
light
|
perfect visibility conditions, limited only by interference from
background lighting
|
perfect visibility conditions, limited only by the curvature of the
Earth |
existing visibility conditions, limited only by the curvature of the
Earth |
|
On a chart, the characteristic of the light on a lighthouse is shown as
flashing white with a red sector. The red sector __________. |
is used to identify the characteristics of the light |
indicates the limits of the navigable channel |
serves no significant purpose |
indicates a danger area |
|
A light having characteristics which include color variations is defined
as __________. |
oscillati |
fluctuati |
switching
|
alternating |
|
Which of the following traits possessed by an articulated light makes it
superior to other types of buoys? |
The fog horn signal travels farther to sea |
The radar reflectors return better signals |
It is equipped with strobe lights |
It has a reduced watch circle |
|
On navigational aids, what does the light characteristic "Fl(2+1)" mean? |
A
flashing light combined with a fixed light of greater brightness |
A
light showing groups of two or more flashes at regular intervals |
Light flashes combined in groups, with a different number of flashes in
each group |
A
fixed light varied at regular intervals by groups of two or more flashes
of greater brightness |
|
An alternating light __________. |
shows a light with varying lengths of the lighted period |
marks an alternate lesser-used channel |
is used as a replacement for another light |
shows a light that changes color |
|
What is characteristic of an occulting light? |
1
sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse |
4
sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse |
5
sec. flash, 5 sec. eclipse |
6
sec. flash, 6 sec. eclipse |
|
A light that has a light period shorter than its dark period is
described as __________. |
alternating |
pulsating |
occulting |
flashing |
|
An occulting light is one in which __________. |
the period of light exceeds the period of darkness |
the period of darkness exceeds the period of light |
the periods of light and darkness are equal |
there is only a partial eclipse of the light |
|
What is characteristic of an isophase light? |
6
sec. flash, 3 sec. eclipse |
4
sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse |
2
sec. flash, 5 sec. eclipse |
1
sec. flash, 1 sec. eclipse |
|
What is the characteristic of a quick light? |
Durations of light and darkness are equal |
Shows not less than 60 flashes per minute |
Shows groups of 2 or more flashes at regular intervals |
Shows quick flashes for about 5 seconds followed by a 1 second dark
period |
|
Some lights used as aids to marine navigation have a red sector to
indicate a danger area. How are the limits of a colored sector of light
listed in the Light List? |
Geographical positions outlining the area of the sector |
True bearings as observed from a vessel toward the light |
True bearings as observed from the light toward a vessel |
Bearings given in the Light List are always magnetic |
|
Which item in illustration D034NG below shows a fixed and flashing
light? |
A |
B |
C |
D |
|
Which item in illustration D034NG below shows a flashing light? |
A |
B |
C |
D |
|
Which item in illustration D034NG below shows an occulting light? |
A |
B |
C |
D |
|
Which item in illustration D034NG below shows a Morse (A) light? |
A |
B |
C |
D |
|
What is NOT true concerning color sectors of lights? |
Color sectors are expressed in degrees from the light toward the vessel. |
Color sectors may indicate a turning point in a channel. |
Color sectors may indicate the best water across a shoal. |
Color sectors may indicate dangerous waters. |
|
Red sectors of navigation lights warn mariners of __________. |
floating debris |
heavily trafficked areas |
shoals or nearby land |
recently sunken vessels |
|
You are underway and pass by a lighthouse. Its light, which was white
since you first sighted it, changes to red. This means __________. |
you have entered an area of shoal water or other hazard |
the lighthouse has lost power and has switched to emergency lighting |
the light is characterized as alternately flashing |
it is the identifying light characteristic of the lighthouse |
|
A List of Lights entry (L Fl) is a single flashing light which shows a
long flash of not less than __________. |
1.0 second duration |
1.5 seconds duration |
2.0 seconds duration |
3.0 seconds duration |
|
The time required for a lighted aid to complete a full cycle of light
changes is listed in the Light List as the __________. |
function |
period |
frequency |
set |
|
The period of a lighted aid to navigation refers to the __________. |
length of time between flashes of the lig |
date of construction or establishment
|
time required for the light to complete each cy |
time required for the longest flash of each cycle |
The four standard light colors used for lighted aids to navigation are
red, green, white, and __________.
|
purple
|
blue
|
yellow |
orange |
|
What characteristics can be used to identify a lighthouse |
type of structu |
painted col |
light color and phase characteristic
|
All of the above. |
|
When trying to sight a lighthouse you notice a glare from a town in the
background. The range at which the light may be sighted due to this
glare is __________. |
increased slightly due to extra lighting |
increased if the light is red or green due to contrast with the glare |
considerably reduced |
unchanged |
|
The height of a light is measured from which reference plane? |
Mean high water |
Geographical sea level |
Mean low water |
Average water level |
|
Which factor(s) is/are used to develop the charted information of a
lighthouse? |
Height of the light only |
Height of the observer and the intensity of the light |
Height and intensity of the light |
Height of the light and the observer |
|
Luminous range is the _________ |
maximum distance at which a light may be seen in clear weath |
maximum distance at which a light may be seen considering the height of
the light and the height of the observer
|
maximum distance at which a light may be seen under existing visibility
conditi |
average distance of visibility of the light |
|
The luminous range of a light takes into account the ________ |
observer's height of eye
|
existing visibility conditio |
glare from background lighti |
elevation of the light |
|
The maximum distance at which a light may be seen under existing
visibility conditions is called __________. |
nominal range |
luminous range |
geographic range |
charted range |
|
When a light is first seen on the horizon it will disappear again if the
height of eye is immediately lowered several feet. When the eye is
raised to its former height the light will again be visible. This
process is called __________. |
checking a light |
raising a light
|
bobbing a light |
obscuring a light |
|
The nominal range of a light may be accurately defined as the maximum
distance at which a light may be seen __________. |
under perfect visibili |
under existing visibility conditions
|
with ten miles visibil |
with fifteen miles visibility |
|
Clearance gauges at bridges indicate __________. |
the height of the tide |
depth of water under the bridge |
charted vertical clearance at mean low water |
distance from the water to low steel of the bridge |
|
Drawbridges equipped with radiotelephones display a __________. |
white sign with the number 16 and the call sign on it |
day signal of a yellow diamond marked with the call sign |
blue and white sign showing the radio's channels |
black and white diamond marked with RT 16 |
|
The dumping of refuse in a lock is permitted __________. |
when approved by the lockmaster |
when locking downbound |
at no time |
during high water only |
Descending boats, while awaiting their turn to enter a lock, shall NOT
block traffic from the lock. They shall be above the lock by at LEAST
__________.
|
100 feet
|
200 feet
|
300 feet
|
400 feet |
|
The following boats are approaching a lock. Which has priority for
locking? |
Corps of Engineer towboat running empty-headed |
passenger vessel |
An integrated chemical tow |
An pleasure yacht |
|
The following types of vessels are awaiting lockage on the upper
Mississippi. Which type of vessel is normally passed through the lock
first? |
Commercial towboats |
Commercial fishing vessels |
Pleasure craft |
Commercial passenger vessels |
|
The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35
feet. Which of these tows will require a double lockage? |
6
jumb(3 abreast and 2 long) with a standard on each side of your boat |
9
jumbo barges |
4
standard barges abreast next to your boat's head and 3 jumbo abreast in
the lead |
A
set-over single |
|
In order to utilize the capacity of a lock to its maximum, pleasure
craft are locked through with all of the following EXCEPT __________. |
cement barges |
sand barges |
oil barges |
coal barges |
|
All persons or vessels within the lock area, including the lock approach
channels, come under the authority of the __________. |
lockmaster |
dock captain |
lock foreman |
dockmaster |
In addition to monitoring channel 16, all Corps of Engineer locks may
use as working channels __________.
|
12, 13 and 14
o |
06, 12 and 22A
o |
01A, 05A and 07A
o |
14, 24 and 28 |
|
You are approaching a swing bridge at night. You will know that the
bridge is open for river traffic when __________. |
the red light changes to green |
the red light is extinguished |
the amber light changes to green |
the fixed, green light starts to flash |
|
Illustration D036NG below represents a fixed C of E lock and dam. What
navigational light(s) is(are) exhibited at the position indicated by the
letter D? |
Three green lights |
One red light |
Two green lights |
No light |
|
Illustration D037NG below represents a movable dam. If there is high
water and the wickets are down so that there is an unobstructed
navigable pass through the dam, what light(s) will be shown at D if the
lock walls and piers are not awash? |
Three red lights |
One amber light |
One red light |
Two red lights |
Illustration D037NG below represents a movable dam. If there is high
water and the wickets are down so that there is an unobstructed
navigable pass through the dam, what light(s) will be shown at B if the
lock walls and piers are not awash?
o |
One amber light
|
Three red lights |
Two red lights |
One red light |
|
What lights would you see on the Illinois water way when any wickets of
the dam or bear traps are open, or partially open, which may cause a set
in the current conditions in the upper lock approach? |
Red over amber (yellow) |
Green over red |
Red over blue |
None of the above |
|
The draw span of a floating drawbridge may be marked with __________. |
three red lights on each side of the dr |
flashing blue lights
|
a
yellow diam |
two white lights |
|
The draw span of a floating drawbridge may be marked with __________. |
flashing blue lights |
three red lights on each side of the draw |
a
yellow and white diamond |
a
yellow light showing Morse Code |
|
You are approaching a multiple-span bridge at night. The main
navigational channel span will be indicated by __________. |
a
flashing green light in the center of the span |
a
quick flashing red or green aid to navigation |
a
steady blue light in the center of the span |
3
white lights in a vertical line in the center of the span |
|
The white lights in a vertical line on a multiple-span bridge indicate
_________ |
the draw span is inoperab |
the river is obstructed under that sp |
scaffolding under the span is reducing the vertical clearance
|
the main channel |
|
When displayed under a single-span fixed bridge, red lights indicate
__________. |
the channel boundaries |
that vessels must stop |
that traffic is approaching from the other side |
the bridge is about to open |
When the navigational channel passes under a fixed bridge, the edges of
the channel are marked on the bridge with what lights?
|
Red lights
|
Yellow lights
|
Red lights on the LDB and green lights on the RDB
|
Three white lights in a vertical line |
|
You are approaching a vertical lift bridge. You know the span is fully
open when __________. |
three white lights in a vertical line are lit |
a
yellow light is illuminated on the bridge pier |
a
red light starts to flash at about 60 times a minute |
there is a range of green lights under the lift span |
|
Which light combination does NOT indicate a navigational channel passing
under a fixed bridge? |
Two green lights in a range under the span |
Red lights on the LDB and green lights on the RDB |
A
fixed red light on each pier at the channel edge |
Three white lights in a vertical line |
|
If the main channel under a bridge is marked with lights of the lateral
system the adjacent bridge piers should be marked with __________. |
occulting white lights |
fixed yellow lights |
fixed white lights |
flashing yellow lights |
|
The channel under a bridge is marked with aids from the lateral system.
The centerline of the channel is marked on the bridge with __________. |
a
black-and-white diamond |
three white lights |
a
yellow triangle |
a
red-and-white octagon |
|
The channel under a bridge is marked with lights of the lateral system.
The centerline of the channel shall be marked on the bridge by
__________. |
an occulting white light |
a
flashing blue light |
three fixed white lights |
a
yellow light |
|
A bridge over a navigable waterway is being repaired. There is a
traveler platform under the bridge's deck that significantly reduces the
vertical clearance. If required by the CG district commander, how will
this be indicated at night? |
A
strobe light visible both up and downstream |
Fixed amber lights under the extreme outer edges of the traveler |
A
quick flashing red light at each lower corner |
Illumination by flood lights |
In which publication could you find information concerning the minimum
lighting required for bridges on U.S. waters?
|
Code of Federal Regulatio |
Mississippi River Systems Light Li |
Notice to Marine |
Chart No. 1. |
|
You are upbound approaching a lock and dam and see two green lights in a
vertical line. This indicates __________. |
the downstream end of the land wall |
the downstream end of an intermediate wall |
the navigable pass of a fixed weir dam |
that a double lockage is in progress |
|
You are downbound approaching a lock and see 3 green lights in a
vertical line. This indicates __________. |
that the lock chamber is open and ready to receive your tow |
that you should hold up until the signal changes to 2 green lights |
the upstream end of the land wall |
the upstream end of the river wall |
|
Restricted areas at locks and dams are indicated by __________. |
flashing red lights upstream and fixed red lights downstream |
yellow unlighted buoys |
signs and/or flashing red lights |
red daymarks upstream and green daymarks downstream |
|
You are approaching Gallipolis Lock and Dam. The traffic signal light is
flashing red. You should __________. |
approach the lock slowly under full control |
proceed at normal speed to enter the lock |
hold your position and not attempt to enter the lock |
None of the above |
|
A flashing red light displayed at a single lock means that the lock
__________. |
cannot be made ready immediately and vessels shall stand clear |
is ready to use but vessels must stand clear |
is ready to use and vessels may approach |
cannot be made ready immediately but vessels may approach |
|
You are approaching a lock and see a flashing amber light located on the
lock wall. You should __________. |
approach the lock under full control |
hang off your tow on the lock wall |
enter the lock as quickly as possible |
stand clear of the lock entrance |
|
Which light signal indicates that you may approach the lock? |
Flashing red |
Flashing amber |
Steady amber |
Steady green |
|
Which light signal indicates that you have permission to enter a lock on
the Ohio River? |
Steady red |
Flashing green |
Flashing amber |
Steady green |
|
When approaching a lock entrance, the visual signal displayed when a
single lock is ready for entrance is a flashing __________. |
red light |
green light |
amber light |
white light |
|
A flashing green light displayed at a single lock means that the lock is
__________. |
ready for entrance, but gates cannot be closed completely |
ready for entrance |
being made ready for entrance |
not ready for entrance |
|
If your vessel must pass through a draw during a scheduled closure
period, what signal should you sound to request the opening of the draw? |
One prolonged blast followed by one short blast |
Three short blasts |
Five short blasts |
One prolonged blast followed by three short blasts |
|
You are approaching a drawbridge and must pass through during a
scheduled closure period. What signal should you sound? |
Three short blasts, two prolonged blasts |
Five short blasts |
Three prolonged blasts |
Two prolonged, two short blasts |
|
You are approaching the first of two drawbridges that span a narrow
channel. The second drawbridge is close to the first. Which signals
should you sound? |
Sound the request-for-opening signal twice in succession to indicate you
must pass through both bridg |
Sound the request-for-opening signal for the first bridge only, who will
notify the second bridge of your approa |
Sound the request-for-opening signal, pause for about 10 seconds, then
sound two prolonged blasts.
|
Sound the request-for-opening signal and, after the bridge acknowledges
it, sound the request-for-opening signal for the second bridge. |
|
You are approaching a drawbridge and have sounded the proper whistle
signal requesting it to open. You hear a signal of one prolonged and one
short blast from the bridge. Which action should you take |
Approach to a point not closer than 400 yards (360 meters) from the
bridge and await further signal |
Hold in the channel as the bridge will open within 15 minutes.
|
Approach under full control to pass through the brid |
Anchor or use an alternate route because the bridge is out of service
for an extended period of time. |
|
A drawbridge may use visual signals to acknowledge a vessel's request to
open the draw. Which signal indicates that the draw will NOT be opened
immediately? |
A
fixed red light |
A
flashing amber light |
A
white flag raised and lowered vertically |
A
flashing white light |
You are approaching an open drawbridge and sound the proper signal. You
receive no acknowledgment from the bridge. Which action should you take?
|
Approach with caution and proceed through the open draw.
|
Resound the opening signal and do not pass through the bridge until
signals have been exchanged.
|
Approach under full control to a position no closer than 400 yards from
the bridge and await a signal from the bridge.
|
Hold in the channel as a vessel is closing the bridge from the other
direction. |
|
You are approaching a drawbridge and have sounded the
request-for-opening signal. The bridge has responded with five short
blasts. How would you respond? |
Any of these signals is considered a valid reponse |
Five short blasts |
White flag raised up and down |
Confirm response on radiotelephone |
|
When approaching a lock and at a distance of not more than a mile,
vessels desiring a single lockage shall sound which signal? |
One long blast followed by one short blast |
Two short blasts |
One short blast followed by one long blast |
Two long blasts |
|
If a towboat requires a double lockage it shall give which sound signal
at a distance of not more than one mile from the lock? |
One long blast followed by one short blast |
One short blast followed by two long blasts |
One long blast followed by two short blasts |
Two long blasts followed by one short blast |
|
Permission to enter the riverward chamber of twin locks is given by the
lockmaster and consists of which sound signal? |
One long blast
|
Two long blasts |
Two short blasts |
One short blast |
|
You are holding position above Gallipolis Lock and Dam when you hear two
long blasts of the horn from the lock. This indicates that you should
__________. |
hold position until two more upbound tows have locked through |
enter the riverward lock |
hold position until the lower gates are closed |
enter the landward lock |
|
Permission to leave the riverward chamber of twin locks is given by the
lockmaster and consists of which sound signal? |
One long blast |
Two long blasts |
Two short blasts |
One short blast |
|
You are downbound on the Ohio River locking through Greenup. The chamber
has been emptied and the lower gates are open. You hear one short blast
of the whistle from the lock. You should __________. |
tie off to the guide wall until the river is clear of traffic |
hold up until another tow enters the adjacent lock |
leave the lock |
hold in the lock chamber due to a malfunction with the gate |
|
What is the approximate geographic visibility of an object with a height
above the water of 70 feet, for an observer with a height of eye of 65
feet? |
16.8 nm |
19.0 nm |
20.6 nm |
22.4 nm |
|
The Light List indicates that a light has a nominal range of 13 miles
and is 36 feet high. If the visibility is 17 miles and your height of
eye is 25 feet, at what approximate distance will you sight the light? |
10.0 miles |
12.9 miles |
14.2 miles |
17.0 miles |
|
A lighthouse is 120 feet (36.6 meters) high and the light has a nominal
range of 18 miles. Your height of eye is 42 feet (12.8). If the
visibility is 11 miles, approximately how far off the light will you be
when the light becomes visible |
12.5 mil |
16.0 miles
|
19.0 mi |
23.5 miles |
|
The Light List indicates that a light has a nominal range of 13 miles
and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and
your height of eye is 25 feet (7.6 meters), at what approximate distance
will you sight the light? |
10.0 miles |
12.9 miles |
14.2 miles |
17.0 miles |
|
The Light List shows that a navigational light has a nominal range of 12
miles and a height above water of 25 feet (7.6 meters). Your height of
eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what
approximate range will you first sight the light? |
12.0 miles |
1.4 miles |
0.5 mile |
5.2 miles |
|
The Light List indicates that a light has a nominal range of 14 miles
and is 42 feet high (12.8 meters). If the visibility is 6 miles and your
height of eye is 20 feet (6.1 meters), at what approximate distance will
you sight the light? |
20.1 miles |
10.0 miles |
7.6 miles |
6.0 miles |
The Light List shows that a navigational light has a nominal range of 17
miles and a height above water of 28 feet (8.5 meters). Your height of
eye is 32 feet (9.8 meters) and the visibility is 11.0 miles. At what
approximate range will you first sight the light?
|
15.7 miles
|
18.0 miles
|
12.6 miles
|
11.0 miles |
The Light List indicates that a light has a nominal range of 14 miles
and is 42 feet
(12.7 m) high. If the visibility is 16 miles and your height of eye is
20 feet (6.1 m), at which approximate distance will you sight the light? |
7.6 miles |
20.1 miles |
16.0 miles |
12.8 miles |
|
The Light List shows that a navigational light has a nominal range of 22
miles and a height above water of 48 feet (14.6 meters). Your height of
eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what
approximate range will you first sight the light? |
32.0 nm |
13.2 nm |
14.7 nm |
10.5 nm |
|
The Light List indicates that a light has a nominal range of 20 miles
and is 52 feet high. If the visibility is 12.0 miles and your height of
eye is 20 feet, at what approximate distance will you sight the light? |
21.5 miles |
20.0 miles |
13.7 miles |
12.0 miles |
|
The Light List shows that a navigational light has a nominal range of 19
miles and a height above water of 52 feet (15.8 meters). Your height of
eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what
approximate range will you first sight the light? |
16.0 miles |
19.0 miles |
10.0 miles |
17.3 miles |
|
The Light List indicates that a light has a nominal range of 20 miles
and is 52 feet (16 meters) high. If the visibility is 20 miles and your
height of eye is 20 feet (6 meters), at what approximate distance will
you sight the light? |
33.0 nm |
20.0 nm |
13.5 nm |
8.5 nm |
|
The Light List shows that a navigational light has a nominal range of 10
miles and a height above water of 38 feet (11.6 meters). Your height of
eye is 52 feet (15.8 meters) and the visibility is 11.0 miles. At which
approximate range will you first sight the light? |
10.5 miles |
13.9 miles |
15.6 miles |
18.0 miles |
|
The Light List indicates that a light has a nominal range of 10 miles
and is 11 feet high. If the visibility is 5 miles and your height of eye
is 20 feet, at what approximate distance will you sight the light? |
6.3 miles |
7.4 miles |
8.4 miles |
9.0 miles |
|
The Light List shows that a navigational light has a nominal range of 6
miles and a height above water of 18 feet (5.5 meters). Your height of
eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what
approximate range will you first sight the light? |
1.5 miles |
2.0 miles |
6.0 miles |
12.7 miles |
|
The Light List indicates that a light has a nominal range of 14 miles
and is 26 feet high. If the visibility is 14 miles and your height of
eye is 20 feet, at which approximate distance will you sight the light? |
7.5 miles |
11.2 miles |
14.0 miles |
18.1 miles |
|
The Light List shows that a navigational light has a nominal range of 12
miles and a height above water of 25 feet (7.6 meters). Your height of
eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what
approximate range will you FIRST sight the light? |
5.5 miles
o |
6.3 miles
|
8.0 miles
o |
12.0 miles |
|
The Light List shows that a navigational light has a nominal range of 5
miles and a height above water of 21 feet (6.4 meters). Your height of
eye is 32 feet (9.8 meters) and the visibility is 1.0 mile. At what
approximate range will you first sight the light? |
1.0 mile |
1.5 miles |
5.0 miles |
11.7 miles |
|
The Light List indicates that a light has a nominal range of 14 miles
and is 26 feet high. If the visibility is 4 miles and your height of eye
is 20 feet, at what approximate distance will you sight the light? |
7.5 miles |
9.6 miles |
11.2 miles |
14.0 miles |
|
The Light List shows that a navigational light has a nominal range of 15
miles and a height above water of 29 feet (8.8 meters). Your height of
eye is 52 feet (15.8 meters) and visibility is 6.0 miles. At which
approximate range will you first sight the light? |
8.0 miles |
11.0 miles |
14.5 miles |
16.0 miles |
The Light List indicates that a light has a nominal range of 18 miles
and is 38 feet high. If the visibility is 6 miles and your height of eye
is 15 feet, at which distance will you sight the light?
|
14.8 nm
|
18.0 nm
|
6.0 nm
|
11.7 nm |
|
The Light List indicates that a light has a nominal range of 8 miles and
is 48 feet(14.6 meters) high. If the visibility is 6 miles and your
height of eye is 35 feet(10.7 meters), at what approximate distance will
you sight the light? |
8.0 nm |
15.0 nm |
12.4 nm |
5.9 nm |
|
The Light List shows that a navigational light has a nominal range of 18
miles and a height above water of 22 feet (6.7 meters). Your height of
eye is 16 feet (4.9 meters) and the visibility is 2.0 miles. At which
approximate range will you first sight the light? |
2.0 miles |
2.7 miles |
4.2 miles |
5.8 miles |
|
The Light List shows that a navigational light has a nominal range of 6
miles and a height above water of 18 feet (5.5 meters). Your height of
eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which
approximate range will you first sight the light? |
5.6 miles |
6.4 miles |
9.8 miles |
12.1 miles |
|
The Light List shows that a navigational light has a nominal range of 15
miles and a height above water of 40 feet (12.2 meters). Your height of
eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what
range will you FIRST sight the light? |
6.2 miles
|
9.5 miles
|
12.9 miles
|
14.2 miles |
