Each vessel in ocean and coastwise service must have an approved EPIRB. An EPIRB __________.

Correct Answer: Option D — all of the above

EPIRBs must be stowed for automatic float-free deployment, remain readily accessible for maintenance, and function as radio beacons. These requirements ensure that in a catastrophic sinking, the device activates and transmits a distress signal to satellite systems, fulfilling critical USCG and international GMDSS carriage requirements for ocean-going vessels.