46 C.F.R. § 113.30-3 Means of communications.
Title 46 - Shipping
(a) An emergency means of communication required by this subpart must— (1) Be comprised of either fixed or portable equipment; and (2) Provide common talking means of two-way voice communication and calling among the navigating bridge, emergency control stations, muster stations, embarkation stations, and other strategic positions listed in §113.30–5. (b) The means of communication and calling must be a sound-powered telephone or other reliable voice communication method and must be independent of the vessel's electrical system. [CGD 94–108, 61 FR 28289, June 4, 1996]
Title 46: Shipping
PART 113—COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT
Subpart 113.30—Internal Communications
§ 113.30-3 Means of communications.

