SUBPART A—Whistles (§86.01 to §86.15)
- 86.01—Frequencies and range of audibility.
- 86.03—Limits of fundamental frequencies.
- 86.05—Sound signal intensity and range of audibility.
- 86.07—Directional properties.
- 86.09—Positioning of whistles.
- 86.11—Fitting of more than one whistle.
- 86.13—Combined whistle systems.
- 86.15—Towing vessel whistles.