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.
source: CGFR 58-17, 23 FR 3377, May 20, 1958, unless otherwise noted.
cite as: 33 CFR 67.10-5