UPGRADE to 100-TON 
Inland, Great Lakes or Near Coastal

Recency - 90 days must be in the past 3 years on vessels.

 Inland - 360 days of service in the deck department.

Near Coastal - 720 days of service in the deck department on Ocean, Near Coastal or Great Lakes waters, OF WHICH:  service on inland waters, other than Great Lakes, may substitute for up to 360 days of the total required service.

Great Lakes - 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 US (excluding the Great Lakes)

Tonnage Calculations
Great Lakes & or Inland

Tonnage Calculations
Near Coastal

25-GRT - 271 days (75%) or more for endorsement on vessels 5 GRT or less OR 90 days (25%) of service on vessels of 1-25 GRT OR 180 days (50%) of service on vessels 1-16 GRT.

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.

50-GRT - 90 days (25%) of service on vessels of 25 GRT or above OR 180 days (50%) of service on vessels 17 GRT or above.

50-GRT - 180 days (50%) of service on vessels of 26 GRT or above, OR 360 days of service on vessels of 17 GRT or above.

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.

100-GRT - 180 days (25%) of service on vessels of 51 GRT or above, OR 360 days of service on vessels of 34 GRT or above.