Requirements to Have Sound-Producing Devices
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) |
