33 CFR § 67.10-5
Location requirements
August 2, 2023
§ 67.10-5 Location requirements.
The sound signal required by §§ 67.20–10, 67.25–10, and 67.30–10 must:
(a) Be located on the structure so that the sound signal produced is audible over 360° in a horizontal plane at all ranges up to and including the required rated range; and
(b) Be located at least 10 feet but not more than 150 feet above mean high water.