USCG-DECK-SEA-L2.2

Route credit: what substitutes for what

USCG-DECK-SEA-M2 · Waters, routes and recency · USCG-DECK-SEA-M2-A Route definitions, route substitution caps and the 3-in-3 and 1-in-5 clocks for deck officers. 3 lessons.

Great Lakes counts in full, US inland counts for half, and each deck endorsement sets its own cap on substitution. The caps decide how much harbour and ICW time is useful.

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.