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Master Inland (25/50/100 Ton) or Master Great Lakes & Inland (25/50/100 Ton) License Requirements by the U.S. Coast Guard

great lakes master 100 license

The Master of Self-Propelled Vessels Up To 100 Ton License is broken into categories of 25, 50, or 100 gross tons. This license qualifies mariners to operate a USCG inspected vessel up to qualified tonnage with up to the maximum certified passenger carrying capacity.

This License also meets requirements for OUPV license. The Masters Up To 100 Ton license gives you the ability to serve on either inspected or uninspected vessels as you choose.

A Master Up To 100 Ton (25/50/100 Ton depending on the experience) Inland license allows the holder to commercially operate inspected and uninspected vessels within the designated boundary line for Inland - bays, sounds, rivers, harbors, and lakes (except Great Lakes).

The Master Up To 100 Ton (25/50/100 Ton) Great Lakes & Inland license allows the holder to serve as Master on vessels of less than 100 tonnage on the Great Lakes & Inland waters.

gl inland master 100 ton license

The Master Less Than 100 Ton License qualifies mariners to operate a USCG inspected vessel up to qualified tonnage with up to the maximum certified passenger carrying capacity

mls 25 50 100 ton

General Requirements for Master Less Than 100 Ton GL and/or Inland License

  • Age: 19 years of age
  • Must have US Citizenship
  • TWIC (Transportation Workers Identification Card)
  • Medical Certificate
  • Sea Service letters or discharges
  • USCG Approved First Aid (completed within 1 year)
  • USCG Approved Valid CPR
  • Complete Coast Guard exam or an approved course

USCG Master Less Than 100 Ton Great Lakes and/or Inland License Requirements

Sea Service Requirements

  • Sea Service: 360 total days of service in the deck department, of which - 90 days of service on Great Lakes, otherwise the endorsement will be limited to inland waters of the United States (excluding the Great Lakes)
  • Recency: 90 days in the past 3 years on vessels.
  • Experience gained in the engine department on vessels of appropriate tonnage may be creditable for up to 90 days of the service.

Service Tonnage Calculations

  • For 100 GRT License: 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
  • For 50 GRT License: 90 days (25%) of service of vessels of 26 GRT or above, OR 180 days (50%) of service on vessels 17 GRT or above. If the applicant has 1 day of service BEFORE March 24, 2014 on a vessel greater than 5 GRT, the MMC may be issued for 50 GRT without meeting this tonnage calculation.
  • For 25 GRT: 271 days (75%) or more for endorsement on vessels 5 GRT or less; 90 days (25%) of service on vessels of 1-25 GRT OR 180 days (50%) of service on vessels 1-16 GRT.
  • If 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 Requirements

  • Sea Service: 180 days on sail or auxiliary sail vessels
  • Complete Coast Guard exam or an approved course

Commercial Assistance Towing Endorsement

Exams

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Disclaimer: For general information purpose - please check with USCG for the latest requirements and accurate info

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