USCG-DECK-SEA-L2.3

Recency and renewal for deck officers

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.

Two clocks run on a deck officer: a **3-in-3** rule for new and raised endorsements and a **1-in-5** rule for renewal. Know which one applies before you take a long break ashore.

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.