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How to Get Your 25/50/100-Ton Master License

The Master License is the highest level of captain's license that can be obtained and allows you to perform the duties of an OUPV/Six-pack captain and also operate inspected vessels. Inspected vessels are approved to carry seven or more paying passengers and have been built in accordance with rigid USCG standards.

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Infographic: One-Minute Guide to Getting the 25/50/100-Ton License

Infographic: One-Minute Guide to Getting the 25/50/100 Ton License
Infographic: One-Minute Guide to Getting the 25/50/100 Ton License
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Common 25/50/100-Ton License Questions

How big is a 25/50/100-ton vessel?

A 25-ton vessel can be 40-65 feet depending on how its built. A 50-ton vessel can be 50-70 feet depending on the type vessel and material it is built with. A 100-ton vessel can be 65 feet or more depending on its construction and commercial uses. These are generalizations but are useful guides.

Where can I take a 100-Ton Masters License practice test?

Mariners Learning System offers a USCG-approved course including practice questions to prepare you for the 25-ton, 50-ton, and 100-ton master license exams. You can purchase an online edition of the course or the Deluxe Edition that includes both hard copy and digital materials.

How do I upgrade from a 50-Ton to 100-Ton Master License?

To upgrade from a 50 to 100 ton Master License, you need to be able to document the following sea service requirements:

  • 100 GRT - 90 days (25%) of service on vessels of 51 GRT or above.
  • 180 days (50%) of service on vessels of 34 GRT or above.

You then need to take the MLS Coast Guard approved Upgrade course and exam.

Next Steps to Get Your 100-Ton Master License

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The Definitive Guide To Becoming A Licensed Captain

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