Rules of the Road · Maneuvering Signals (Intent vs Action)

Under the Inland Rules, the maneuvering signal system is fundamentally different from 72 COLREGS because:

Explanation

The core distinction: under 72 COLREGS, whistle signals announce an ACTION already under way. Under U.S. Inland Rules, whistle signals are proposals of INTENT — both vessels must exchange matching signals (agree) before executing the maneuver.

Authority: Inland Rule 34(a)

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