Section 67.10-1 - Apparatus requirementsThe sound signal required by §§ 67.20-10 , 67.25-10 , and 67.30-10 must:
(a) Have its maximum intensity at a frequency between 100 and 1,100 Hertz;(b) Sound a 2-second blast every 20 seconds (2 seconds sound, 18 seconds silence) unless otherwise authorized by the District Commander;(c) Have the rated range required by § 67.20-10 , § 67.25-10 , or § 67.30-10 ;(d) Have a height not exceeding 25 feet;(e) Have not more than eight sound sources;(f) Be approved by the Coast Guard under § 67.10-15 ; and(g) Be permanently marked with:(1) The date of Coast Guard approval;(2) The manufacturer and date of manufacture;(4) The approved range; and(5) The power necessary to comply with the provisions of paragraph (c) of this section.