USCG-ROR-L2.4
The Bridge-to-Bridge Radiotelephone Act (33 CFR Part 26)
USCG-ROR-M2 · Steering, sailing and signalling: the Inland deltas · USCG-ROR-M2-A Narrow channels, the river rules, whistle signals of intent and agreement, and bridge-to-bridge radiotelephone.
Every power-driven vessel of **20 m or more** carries a bridge VHF, keeps a watch on channel 13 and speaks English. That includes the visiting superyacht.
AI-drafted catalogue content pending SME review. The Rules of the Road examination is the one module where a near miss fails you, and module assignments and pass marks are set by NMC examination policy rather than regulation; verify with the National Maritime Center before booking an exam or relying on any figure here.