Section 113.30-3 - Means of communications(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 reliable means of voice communication and must be independent of the vessel's electrical system.CGD 94-108, 61 FR 28289, June 4, 1996, as amended by USCG-2003-16630, 73 FR 65201, Oct. 31, 2008