It's the Law: Required Equipment

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.

Sound-producing devices

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 65.6 feet long (includes PWCs)	Whistle or horn audible for at least one-half mile is required.
Vessel 65.6 feet long or longer	Whistle or horn audible for at least one mile is required.

Michigan Department
of Natural Resources

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Online boating safety handbook last modified: July 13, 2011
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