USCG-DECK-SEA-L3.3

Above 200 GRT: the < 500 and < 1,600 bands, and unlimited tonnage

USCG-DECK-SEA-M3 · Tonnage · USCG-DECK-SEA-M3-A GRT versus GT for deck credit, the 25/50 formula below 200 GRT and tonnage conditions up to unlimited. 3 lessons.

Above 200 GRT, tonnage stops being a formula and becomes a set of **conditions**: service on vessels of **more than 50 GRT** or **more than 100 GRT**. The unlimited track has its own formula in **11.402**.

AI-drafted catalogue content pending SME review. Deck sea service credit for yacht, foreign-flag and recreational service is largely evaluator discretion, including 12-hour days, days alongside and GT-only tonnage; verify with the National Maritime Center before relying on any day count.