, Training for Mariners. The First with Online Study for the Maritime Industry.

  Welcome to Established in 1996, we are the ultimate source for online USCG exam preparation assistance. provides free online exam preparation along with downloadable studyguides and standalone software that allows you to continue your studies without an internet connection.


Prepare for or supplement your studies for your USCG license exam here.

Click here to create an account and enter SeaSources new online study.


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The subjects listed below are currently available for testing in the new online study room and are available for download to your computer. Click on subject below for details.

Engineering Examination Questions

All Engine Room Questions

Engine Room Electrical         

Engine Room General          

Engine Room Safety            

Engine Room Steam            

Engine Room Motor   

QMED Oiler          

Deck Examination Questions

Master 25/50/100 Ton

Operator Uninspected Passenger Vessel

All Deck Questions

Able Seaman Questions

Advanced Subjects, Unlimited Oceans Master, Mate

Rules of the Road  

Aids to Navigation  Glossary Included

Breathing Apparatus

Cargo Equipment 

Cargo Stowage

Charts and Publications 

Chemical Testing

Right Whales

Damage Control  

Deck Engineering

Deck Safety

Emergency Procedures 

FCC Exam Questions

Fire Fighting Glossary Included 

First Aid  


Great Lakes

Hazardous Cargo

Inert Gas

Inland Navigation  

Instruments and Accessories



Liquid Cargo and Bunkering

Marine Radio Operator 

Meteorology  "Glossary Included" 

Mobile Offshore Drilling Unit

Latest NMC / USCG Questions

Celestial Navigation

Navigational Procedures

Pollution Control and Prevention

Rules and Regulations

Plotting/Navigational Problems


Survival Craft

Seamanship   Glossary Included

Sailing Vessels  

Ship Handling 

Ships Construction Glossary Included  

Ships Business


Stability and Trim Glossary Included 


Tides and Currents Glossary Included 



Common Knots

Radar Plotting



All Coast Guard Deck Examination Questions

 Listed below is a table of contents of the questions on this subject as they appear in the online study. Click on the "Enter Online Study" link above to begin preparing for your exam.

The Online Study database is updated annually now as soon as the NMC releases their sample exams. Sample exams are also posted in the online study which can be accessed from the link above.

The questions and illustrations posted in the online study are current and constantly being updated.

December 13, 2019.  Just added the following to the online study database: ONC07 OUPV-Near Coastal Q100,Q170,171,172. GLI07 OUPV Q100, Q300, Q356,357,358. And GLI08 Limited OUPV Q301, 360-361. SeaSources%20Login%20Instructions.htm

December 1, 2019. More new deck questions have been added under, "New Questions Extracted from NMC Samples" / Deck Questions. In the pull down menu of the online study.

November 23, 2019. More sample questions added today under the Engine Ratings category. Can be found in the pull down menu as follows: "NMC Sample Examinations", Engineer Rating 2019, QMED01 Junior Engineer Q800-801, QMED02 Electrician-Refrigerating Engineer Q802-Q803, QMED03 Oiler Q804-Q805.

November 14, 2019. 137 new questions have been added to the online study from the samples so far. They can be found under "New Questions Extracted from NMC Samples" , Engine Officer 8_19 in the pull down menu. Be sure to check these out.

November 1, 2019. Sample exams for DDE01 DDE,Unlimited HP Q620-Q625 and DDE04 DDE,1000_4000 HP Q630-Q634 were just added to the online study. Looks like some new questions and new illustrations in these samples.

October 27, 2019. Just added the latest NMC sample questions for 3AE01 Third Assistant Engineer, Unlimited Q531-Q538 to the online study. More to follow. If you are studying for any Engine Room License I strongly suggest that you look through these samples under "NMC Sample Examinations" Unlimited Engineer Officers 8_19.

September 29, 2019. Finished processing the Engine Room illustrations. The final count is 315 updated graphics added to the online study. Now to start the long process of the new questions.

September 26, 2019. As of today I have now added a total of 228 updated illustrations to the Engine Room categories. More to come.

September 12, 2019. The 2019 sample questions have been posted by the NMC. Starting the long process of assimilating these into our system. Looks at first glance like I will be finding some all new questions and illustrations to add. I will keep everyone posted as to the progress.

From the pull down menu in the online study select from the following topics:

All Deck Examination Questions As of March 24, 2014 Regulations

  • Rules of the Road:

  • Aids to Navigation:

  • Breathing Apparatus:

  • Bulk Liquid Cargo and Bunkering:

  • Cargo Equipment:

  • Cargo Stowage:  

  • Charts and Publications:

  • Chemical Testing and Right Whales:

  • Damage Control:  

  • Deck Engineering:  

  • Deck Safety:

  • Emergency Procedures:

  • Fire Fighting:

  • First Aid:

  • Great Lakes:

  • Hazardous Cargo:

  • Inert Gas:

  • Inland Navigation:

  • Instruments and Accessories:

  • Lifesaving:

  • Meteorology: 

  • Navigational Procedures:

  • Plotting: Chesapeake Bay, Block Island, Long Island Sound

  • Pollution Control and Prevention:

  • Rules and Regulations:

  • Sailing Vessels:

  • Ship Handling:

  • Ships Construction:

  • Ships Business:

  • Signaling:

  • Stability and Trim

  • Survival Craft:

  • Tankerman:

  • Tides and Currents:

  • Towing:

  • Watchkeeping:

  If you are studying for a United States Coast Guard Deck License exam which includes any of these modules, you should  work through these questions until you are scoring 90% or better on them.

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Revised: 12 May 2020 17:36:51 -0400 

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For details on license requirements, application forms,  licensing fees, and testing locations, visit the United States Coast Guard / National Maritime Centers web site and look under Mariner's information center. The questions used in the online study are once again available to the public in PDF format from the NMC link above. The illustrations are not yet available for some of these questions.

Vessel Nomenclature  

View Screenshots of "TesTTaker" Software  

View Screenshots/Tutorial of Online Study

View comments from SeaSources Members 

See also:

SeaSources online Celestial Navigation Course 

MARYLAND NAUTICAL  Great source for practice charts and study guides


National Oceanic & Atmospheric Administration (NOAA)

The Navigation Center

Chart No. 1 Nautical Chart Symbols Abbreviations and Terms

Bluewater Books and Charts 

Search CFR'S Online

Open Book Renewals

Required Subjects for all Deck Licenses

Required Subjects for all Engineering Licenses

Required Subjects for Mobile Offshore Drilling Units, MODU.

Sea Service Requirements for Coast Guard Licenses