Table of Contents

Download the PDF Version

It's the Law

Sound-Producing Devices


In periods of reduced visibility or whenever a vessel operator needs to signal his or her intentions or position, a sound-producing device is essential.

If on State Waters

Vessel 16 feet up to 26 feet long and under engine power Whistle capable of producing a blast of two seconds or more and audible for at least one-half mile is required.
Vessel 26 feet long or longer and under engine power Whistle capable of producing a blast of two seconds or more and audible for at least one mile is required.

If on Federally Controlled Waters

Vessel less than 39.4 feet long (includes PWC) Something such as handheld air horn, an athletic whistle, or an installed horn is required.
Vessel 39.4 feet long or longer Sound signal should be audible for one-half mile and should last for 4 to 6 seconds.