Table of Contents

It's the Law

Sound-Producing Devices


Vessels less than 65.6 feet (20 meters) in length, which includes PWCs, are required to carry on board a whistle or horn or some other means to make an efficient sound signal audible for at least one-half mile.

Vessels that are 65.6 feet (20 meters) or more in length are required to carry on board a whistle or horn, and a bell that are audible for at least one mile.

Some sound signals that you should be familiar with are:

Restricted Visibility

  • One prolonged blast at intervals of not more than two minutes is the signal used by power-driven vessels when underway.
  • One prolonged blast plus two short blasts at intervals of not more than two minutes is the signal used by sailboats under sail.

Warning

  • One prolonged blast is a warning signal (for example, used when coming around a bend or exiting a slip).
  • Five (or more) short, rapid blasts signal danger or signal that you do not understand or that you disagree with the other boater’s intentions.
PDF Version for Free Download

Download the PDF Version

Also available in eBook format:

Apple iBook B&N Nook Book