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  • Key Requirements for Obtaining Your 25/50/100 Ton Master's License

    by Bob Figular June 20, 2024

    Licensing Requirements: TWIC, Age, Citizenship, Medical Tests, Etc.

    What are the requirements to get a Master's captain's license?  

    Although the necessary boating experience required for each version of the Master's license varies, the bare minimum requirements are the same:  

    • At least 19 years old when submitting your application packet
    • U.S. citizen 
    • Obtain a Transportation Workers Identification Credential (TWIC Card)  
    • Pass a physical examination  
    • Pass a DOT drug test
      • Unless enrolled in a USCG-approved random drug program for the last 185 days and with no failure or refusal to participate in a chemical test for dangerous drugs  
    • Adult CPR/Basic First Aid training  
    • Minimum of 360 days of boating experience, with ninety of these days occurring in the last three years for "recency"
    • Complete a USCG Original License Application Package 

    Finally, you must complete our Coast Guard-approved 25/50 or 100-Ton Master's course. 

    📖 Take a moment to review our one-minute e-guide on obtaining the Master's license. 

     

    What are the sea requirements for the Masters Inland/OUPV Inland?  

    A minimum of 360 days would be required to become Master's Inland/OUPV Inland licensed. Ninety (90) of those days must be done in the last three years. The Coast Guard calls that recency

     Here is a table to give some guidance on the sea time requirements: 

    Category Requirement 46 CFR Reference
    Recency 
    90 days in the past 3 years on vessels of any tonnage. Experience gained in the engine department may be creditable for up to 90 days of the service requirements. 
    11.201
    11.410
    Master Less Than 100 
    Inland - 360 days of service on any waters.
    11.457 
    Great Lakes - 360 total days of service in the deck department. OF WHICH: 90 days of service on Great Lakes. 
    11.455
    Tonnage Calculations 
    100 GRT - 90 days (25%) of service on vessels of 51 GRT or above, OR 180 days (50%) of service on vessels of 34 GRT or above. 
    11.422 
    50 GRT - 90 days (25%) of service on 26 GRT or above vessels, OR 180 days (50%) of service on vessels 17 GRT or above.  11.422 
    25 GRT - 271 days (75%) or more for endorsement on vessels 5 GRT or less, OR 90 days (25%) of service on vessels 1-25 GRT OR 180 days (50%) of service on vessels 1-16 GRT. 
    11.422 
    (If the mariner does not meet the tonnage calculation for 50 GRT or more, he or she is eligible for 25 GRT) 
    Sail or Auxiliary Sail Endorsement (Optional) 
    180 days on sail or auxiliary sail vessels, and complete the CG Auxiliary Sail exam module or approved Auxiliary Sail course 


    What are the sea requirements for the Masters Inland/OUPV Near Coastal?

    The sea service requirements for the Master's Inland/OUPV Near Coastal are at least 360 days of underway experience since age 16, with 90 of those days outside the boundary lines. Ninety (90) of the total 360 days must be done in the last three years for recency. Recency can be completed on any body of water - whether rivers, lakes, bays or the ocean - because the Coast Guard's primary concern is ensuring you have recent experience on the water.

     

    What are the sea requirements for the Masters Near Coastal?  

    A Master's Near Coastal License would require a minimum of 720 days of underway experience since age 16, with 360 of those 720 days outside the boundary lines. Ninety (90) of the total 720 days must be done in the last three years for recency. Recency can be completed on any body of water - whether rivers, lakes, bays or the ocean - because the Coast Guard's primary concern is ensuring you have recent experience on the water.  

     Here is a table to give some guidance on the sea time requirements: 

    Category
    Requirement
    46 CFR Reference
    Recency 90 days in the past 3 years on vessels. Experience gained in the engine department on vessels of any tonnage may be creditable for up to 90 days of the service requirements. 
    Master Less Than 100 


    720 days of service in the deck department on Ocean, Near Coastal or Great Lakes waters, OF WHICH, service on inland waters may substitute for up to 360 days of the total required service.
    NOTE: Any service will be credited as follows:
    1. Service on GL will be credited day for day
    2. Service on vessels to which STCW applies (inland or NC) will be credited day for day
    Tonnage Calculations 

    100 GRT - 180 days (25%) of service on vessels of 51 GRT or above, OR 360 days (50%) of service on vessels of 34 GRT or above. 
    50 GRT - 180 days (25%) of service on vessels of 26 GRT or above, OR 360 days (50%) of service on vessels of 17 GRT or above. 
    25 GRT - 541 days (75%) or more for endorsement on vessels 5 GRT or less, OR 180 days (25%) or more on vessels 6-25 GRT, OR 360 days (50%) or more on vessels 1-16 GRT. 
    (If the mariner does not meet the tonnage calculation for 50 GRT or more, he or she is eligible for 25 GRT)
    Sail or Auxiliary Sail Endorsement (Optional) 
    360 days on sail or auxiliary sail vessels, and complete CG Auxiliary Sail exam module or approved Auxiliary Sail course 

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