Section 78.17-10 - Loudspeaker system(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.
46 C.F.R. §78.17-10
CGFR 65-50, 30 FR 16955, Dec. 30, 1965, as amended by CGD 74-125A, 47 FR 15231, Apr. 8, 1982
See subchapter J (Electrical Engineering) of this chapter for details.