Boats and Watercraft
Powerboats
Large Ships

What does 3 short blast of the horn mean?

Answer

Wiki User
09/28/2012

International and Inland Navigational rules. Sound and Light Signals.

Rule 34

Maneuvering Signals(a) When vessels are in sight of one another, a power driven vessel underway, when maneuvering as authorized or required by these Rules, shall indicate than maneuver by the following signals on her whistle: -Three short blasts to mean "I am operating astern propulsion".