USCG-DECK-SEA-L3.2

The tonnage formula below 200 GRT

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.

Every Master or Mate endorsement below 200 GRT carries a **tonnage limitation** built from your own service: the **25 per cent** test, the **150-per-cent-of-50** test, and a list of ways to raise it.

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.