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§130.440 Communications system.
(a) Each OSV must have a communications system to immediately summon a crew member to the machinery space wherever one of the alarms required by §130.460 of this subpart is activated.
(b) The communications system must be either—
(1) An alarm that—
(i) Is dedicated for this purpose;
(ii) Sounds in the crew accommodations and the normally manned spaces; and
(iii) Is operable from the pilothouse; or
(2) A telephone operated from the pilothouse that reaches the master's stateroom, engineer's stateroom, engine room, and crew accommodations that either—
(i) Is a sound-powered telephone; or
(ii) Gets its power from the emergency switchboard or from an independent battery continuously charged by its own charger.