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
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. |
