Capts: My 50 Ton Near Coastal License has recently expired and I'm in the process of renewing. I want to raise the tonnage to 100 GRT. To raise the grade how much sea time do I need to achieve a raise in grade to a 100 license. I read the CFR 11.422 as only requiring 90 on a vessel of 34 GRT. Additionally can I renew my license and raise the the grade by proving my seatime at the same time assuming that I meet all other requirement? The confusion comes from the seatime requirement on the CG form show 360 days required. MASTER 100 46 CFR Tonnage Calculations 46 CFR 100 GRT – 180 days of service on vessels of 51 GRT or above, OR 360 days of service on vessels over 34 GRT 50 GRT – 1 day of service on vessels over 5 GRT. Please clarify.