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Course Outline

Sound signaling devices: bell, horn

All watercraft must have an efficient whistle and/or other sound-producing device that can produce a blast that lasts at least two seconds. It is essential in periods of reduced visibility or whenever a watercraft operator needs to signal his or her intentions or position.

Length of Watercraft Type of Device
Less than 40 feet
no bell required
Whistle or horn capable of making efficient sound signal
40 feet to less than 65 feet
no bell required
Whistle audible for 1/2 mile (12 dB)
65 feet to 330 feet
bell required
Gong and whistle audible for 1 mile (130 dB)
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