Information from the Code of Federal Regulations Title 33 Part 83
Navigation Rules require sound signals to be made under certain circumstances. Meeting, crossing, and overtaking situations, described in the Navigation Rules beginning with Rule 32, are examples of circumstances in which sound signals are required. Recreational vessels are also required to use sound signals during periods of reduced visibility and while at anchor.
The sound-producing devices required for vessels is as follows:
International Waters
| Vessel Length | Whistle | Bell | Gong |
|---|---|---|---|
| 12 meters or more (39.4 ft.) | X | ||
| 20 meters or more (65.6 ft.) | X | X | |
| 100 meters or more (328.1 ft.) | X | X | X |
Inland Waters*
| Vessel Length | Whistle | Bell | Gong |
|---|---|---|---|
| 12 meters or more (39.4 ft.) | X | ||
| 20 meters or more (65.6 ft.) | X | X | |
| 100 meters or more (328.1 ft.) | X | X | X |
* There have been changes to the Collision Regulation (COLREGS) and a regulatory change is forthcoming that will align the Inland Navigation rules with the COLREGS. The Coast Guard is exercising its discretion not to enforce the provisions of the inland rules until the regulatory change is enacted.
Information from A Boater’s Guide to the Federal Requirements for Recreational Boats and Safety tips
