46 C.F.R. § 78.17-10 Loudspeaker system.
Title 46 - Shipping
(a) Where fitted, the complete loudspeaker system shall be tested at least once every week. This test shall be made by an officer of the vessel. (b) The date of the test and the condition of the equipment shall be noted in the official logbook. See subchapter J (Electrical Engineering) of this chapter for details. [CGFR 65–50, 30 FR 16955, Dec. 30, 1965, as amended by CGD 74–125A, 47 FR 15231, Apr. 8, 1982]
Title 46: Shipping
PART 78—OPERATIONS
Subpart 78.17—Tests, Drills, and Inspections
§ 78.17-10 Loudspeaker system.