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

Correct Answer: Option D — all of the above

46 CFR 25.25 mandates that EPIRBs must be capable of transmitting distress signals on designated frequencies, be readily accessible for maintenance, and feature a hydrostatic release mechanism to ensure they float free and activate automatically if the vessel sinks, providing a reliable means of locating survivors in distress.