It's the Law: Required Equipment

Sound-Producing Devices

A sound-producing device is required on all waters. It is essential during periods of reduced visibility or whenever a vessel operator needs to signal his or her intentions or position.

If on State Waters:

If your vessel is less than 26 feet long (includes PWCs), the requirement is for mouth-, hand-, or power-operated whistle or horn, or some other means to make an efficient sound signal.
If your vessel is 26 feet long or longer, the requirement is for a whistle or horn, and a bell.

If on Federally Controlled Waters

If your vessel is less than 65.6 feet long (includes PWCs), the requirement is for a whistle or horn audible for at least one-half mile.
If your vessel is 65.6 feet long or longer, the requirement is for a whistle or horn, and a bell audible for at least one mile.

Sound devices

Sound Signals

Some common sound signals that you should be familiar with as a recreational boater are as follows.

Changing Direction

One short blast tells other boaters “I intend to pass you on my port (left) side.”
Two short blasts tell other boaters “I intend to pass you on my starboard (right) side.”
Three short blasts tell other boaters “I am backing up.”

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 blind 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.

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