Rules of the Road · Sound Signals — RV NUC/RAM/Fishing/Towing

In restricted visibility, a vessel not under command, restricted in maneuverability, engaged in fishing, sailing, or towing sounds:

Explanation

These vessels (and a vessel towing or pushing) sound one prolonged followed by two short blasts at intervals not exceeding 2 minutes, in lieu of the signals for power-driven vessels.

Authority: COLREGS/Navigation Rules, Rule 35(c)

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