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

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

Click here to create an account in the online study and begin your license preparation.

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   

Gas Turbine Plants 

QMED Oiler          

Deck Examination Questions

Master 25/50/100 Ton

Operator Uninspected Passenger Vessel

All Deck Exam Modules

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

Previews of Deck and Engine Room 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

Operator of Uninspected Passenger Vessels


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License Requirements:

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.

Operator of Uninspected Passenger Vessels (OUPV/Six-Pack) license allows a holder to carry up to six paying passengers on uninspected vessels up to 100 gross tons.

OUPV Inland License: The OUPV Inland license is restricted to operation shoreward of the boundary line, excluding the Great Lakes. This license is valid on uninspected vessels to 100 gross tons.

  • This license requires at least 360 days of documented experience in the operation of vessels, with 90 of the 360 days occurring in the last three years. Experience gained prior to 15 years of age may not be counted.

  • The OUPV Inland License can be upgraded to an OUPV Near Coastal License once 90 days experience seaward of the boundary line has been achieved.

OUPV Great Lakes & Inland: 360 total with at least 90 days service on the Great Lakes.

OUPV Near Coastal: This license is valid on vessels up to 100 gross tons and out to 100 nautical miles.

The OUPV Near Coastal License also requires at least 360 days of documented experience in the operation of vessels, 90 of which must be gained seaward of the boundary line. Ninety of the 360 days must be in the last three years. Experience gained prior to the age of 15 will not be counted.

Note: Sea Service experience can be counted on your own vessel. A Sea Service Form and proof of ownership are required. Experience on other people's vessels can also be counted. In this instance, to verify experience claimed and vessel details, a completed Sea Service Form with the owner's signature must accompany the application.

Additional Requirements Include:

  • Transportation Workers Identification Credential (TWIC)

  • Age 18 or over

  • Physical, drug test and eye exam

  • CPR/First Aid training

Testing Requirements: Available in the Online Study

Navigation Rules of the Road

  • Part A General
  • Section I Conduct of Vessels in Any Condition of Visibility
  • Section II Conduct of Vessels in Any Condition of Visibility
  • Section III Conduct of Vessels in Restricted Visibility
  • Part C Lights and Shapes
  • Part D Sound and Light Signals
  • Differences between International and U.S. Inland Rules of the Road

Deck Safety

  • Fire Fighting
  • Marine Engine Operations
  • Marine Radiotelephone
  • Lifesaving Equipment
  • Pollution Prevention

Deck General

  • Basic Seamanship
  • Characteristics of Weather systems
  • Ship Handling
  • Emergency Procedures
  • Maritime Law

Piloting and General Navigation

  • Piloting
  • Compasses
  • Plotting
  • Tides and Currents
  • Approaches to Anchorages and Harbors
  • Electronic Navigation Equipment

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   The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of SeaSources.net.

SeaSources.net, Training for Mariners, is a registered Trademark

Copyright 2000 by SeaSources.net. All rights reserved.
Revised: 26 Oct 2023 13:52:09 -0400 

Contact Phone: 207-629-7004

Email: Captain Steve 

  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 updated annually from the NMC sample exams. All illustrations are current.

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See also:

SeaSources online Celestial Navigation Course 

MARYLAND NAUTICAL  Great source for practice charts and study guides


National Oceanic & Atmospheric Administration (NOAA)

Chart No. 1 Nautical Chart Symbols Abbreviations and Terms

Bluewater Books and Charts 

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