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   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 Handling and 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



 We now have a whole new website.


Click here to redirect.

Welcome to SeaSources

   As you navigate through this site, whether for the purpose of studying for a Coast Guard exam, to review or sharpen your nautical skills, or just to keep the Rules of the Road, Colregs, fresh in your mind,  you will be introduced to over 80,000 questions and answers covering all categories of subject matter for both Deck and Engine Room used by the United States Coast Guard for license examination. All related illustrations which are used in reference to the questions are included and can be seen by clicking on "see diagram" when it is present during a quiz. The online quizzes are presented in an interactive, easy to use, point and click, multiple choice format. As you work through the quizzes you will find some questions that are very similar in content but may vary slightly in either the wording or in the order in which the answers appear. Work through them anyway. You have the choice of taking these questions directly as 20 question groups or randomizing whole subjects. This is the first and only site where you will find that All of the questions used are from the National Maritime Centers database of questions used by United States Coast Guard, USCG, Regional Exam Centers for administering tests and are categorized into their specific subjects for targeted study as is displayed in the column on the left. After two or three times through a quiz you will see your scores rapidly improve. Move on to the next quiz and repeat the process. Check your score history frequently to see which subjects you may need to review.   

  The new SeaSources online testing site is now available with the Score History as well as many other new features which we hope will make studying for your exams  enjoyable as well as more affordable. All of the individual subject modules listed on the left are available for download directly from the online test site as well as free upgrades whenever any changes or additions are made to questions or illustrations. Anyone who has previously purchased SeaSources software will be eligible for free upgrades to their modules which were purchased on CD or downloaded.

     For new users of  SeaSources online study, just click on Enter Online Study Room above and go to Create a New User Account, fill out the registration information accurately, enter a valid email address which will be your username, and choose a password that is 5 to 16 characters long. Remember that the password is case sensitive and this will be your final password to log in with. No other passwords will be emailed to you. Once you have created the account you will then check your email inbox for a validation email to confirm the account. If you do not see the validation email please check to make sure it did not go to your spam folder. Clicking on the validation link will take you back to the log in page. The registration information is necessary for the score keeping and progress reports, which are now available in the new test site, and allow registered members to see a history of their scores and progress on all previous quizzes taken.  After you are in the system you can alter your personal information and password. All personal information and e-mail addresses are kept strictly confidential and are not given out to mailing lists nor do we use addresses to bombard you with useless Spam.

  Our database is being edited and updated frequently as well as more subjects and illustrations added to make this site a reliable source of information for all members to use as a supplement to there exam preparation study or general knowledge. Many new illustrations have been added to the database that are excerpts from the material needed to solve specific questions. Rules of the Road and Aids to Navigation are good examples of this. One of our goals is to eventually have a solution or reference illustration to each question. This is what makes this service unique. Anyone who would like to participate by submitting illustrations or solutions to be attached to questions are welcome to do so. Just ask for details on how to submit them. Mariners working together can make this site one of the most powerful tools on the web for fellow mariners. Group participation is highly encouraged! Get involved.

   The new downloadable software modules from the online study are ready to go  These packages are available to install on your pc or laptop and are upgradeable free of charge whenever changes or improvements take place. To see instructional videos on all of the functions of our services click here. If you were a member of of the old online study and have previously purchased software from SeaSources on any module, you are already qualified to receive the new upgrades to that module. The installable version  includes score keeping and score history capabilities as well as being able to create your own practice final exams.   Please feel free to make comments or suggestions on this system while it is still in the development stages. If you would like to participate in the testing of this new software then Download it Here.  Your username and password from the online study are needed to open the new software.   

   Join the thousands of members who have successfully and affordably prepared for their Coast Guard Exam with SeaSources.net. When using the service we recommend using either Mozilla Firefox, Google Chrome, or the latest version of IE as a browser. Listed in the column to the left are the subjects covered as they appear in the online study. If you arrived on this page by doing an internet search on this subject then you need to proceed to the Enter Online Testing Site link above and Register to create an account and get the full benefits of using this site. The latest multiple choice questions on this topic can be downloaded and installed to your computer by creating an account in the online study and installing the latest version of the "Betabox Software".

We are 100% current with the CG question databank. 26 Oct 2023.

Click here to review the new question databank from the NMC.

Click here to see detailed video instructions on using SeaSources.net online license preparation.

   If you are currently a user of the New Online Study, any downloads and purchases made through your old online study account can be rolled over to the new software based on the New Online Study Database.

Note: You will not receive a recorded score to your history for each quiz unless you complete the quiz. 

  Note: If your personal user account is being accessed by multiple users it would be more to their advantage to create their own account in order to receive the benefits of having their own personal score history attached to the quizzes they take.

  Note: Any discrepancies that a user may find, as in answers that they believe are disputable, should be reported so that corrections can be researched and entered.    

A Little History  

  SeaSources was originally founded in 1996 for the purpose of providing an affordable alternative to the outrageous cost of exam preparation for mariners sitting for their first license or document as well as professionals seeking to upgrade. As I remembered studying for my first exam back in 1979 I thought of the stack of floppy discs that I had paid a ridiculous amount of money for and they cancelled themselves out after you had taken X amount of quizzes on them which rendered them useless for review later on. Their had to be a better way. When I first started this project the database of questions was only available in document format. All of the original questions and answers were manually copied and pasted from a word document format into an excel spreadsheet which, as you can imagine, with 28,000 give or take questions was quite an undertaking. Then, after learning Visual Basic programming, I was able to write a program that the DB was plugged into and made available on CD. It soon became apparent that keeping up with the new questions from the Coast Guard as they came out was going to be very difficult as far as updating the CD's which had been purchased. Thus the concept of the online study was born. With the help of an excellent programmer and an updated database we proceeded to make the questions available to anyone for free, talk about affordable, who could access the web and do it in a format that was easy to use as well as being able to plug new questions into as soon as they were available. With the development of the TesTTaker software , many thanks to my good friend Jaime, we have been able to offer not only the online tests but still give our members the ability to install them locally to their computer, if they should choose, and get the new questions updated as they come out. This has proved to be a much more efficient system. SeaSources is currently being accessed by several of the major maritime academies as a supplement to their exam prep on a regular basis.

  The online testing went live in February of 2000 and has gone through many improvements since then and we have many more to come.

  Thank you to more than 70,000 registered SeaSources online users, from the old online study and the new, for their help and suggestions since I started this project almost 25 years ago. And thanks for spreading the word about us as this is how many of our new members come here to study for their License.

Over 1,500,000 quizzes have been taken between the old and the new online study.

Steve and Jaime

SeaSources Developers

Click Here to Continue to the Online Study

No pop ups,  Banners,  Spam,  Garbage, Advertisements, Hidden Gimmicks or any proverbial "Fine Print" to deal with. What you see is what you get. Just down-to-earth information and this site is dedicated to keeping it that way.

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 13:52:07 -0400 

Contact Phone: 207-629-7004


  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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SeaSources Celestial Navigation Training Videos 

Exam Question Downloads  


Download TesTTaker Software  


Free Sample Downloads  


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Contact SeaSources  





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)

Chart No. 1 Nautical Chart Symbols Abbreviations and Terms

Bluewater Books and Charts 

Search CFR'S Online