The sound signal required by Sec. Sec. 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[deg] 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.