USCG-DECK-RATINGS-L1.3
Where deck ratings are legally required, and where yachts sit
USCG-DECK-RATINGS-M1 · The deck rating structure · USCG-DECK-RATINGS-M1-A The 2025 renaming, Ordinary Seafarer and where manning law requires rated deck crew. 3 lessons.
Manning law decides whether your rating is **mandatory** or merely **useful**. Yachts sit in the exemptions of the national statute, but STCW has a longer reach.
AI-drafted catalogue content pending SME review. Able Seafarer sea service figures changed by statute on 18 December 2025 and the CFR and NMC checklists had not been conformed at drafting, so confirm current day counts, exam modules and assessment rules; verify with the National Maritime Center before applying.