What does Emergency Position Indicating Radio Beacon stand for?

• A. Personal locator beacon for emergencies
• B. Bridge-to-bridge transceiver
• C. Search and Rescue Transponder
• D. Emergency Position Indicating Radio Beacon

Answer: (D)

The main concept is understanding what the acronym EPIRB expands to. An Emergency Position Indicating Radio Beacon is a distress beacon carried for emergencies that, when activated, transmits a distress signal along with its location to search and rescue authorities via satellite systems. This specific full form—Emergency Position Indicating Radio Beacon—is what EPIRB stands for.

The other ideas are related but describe different devices or terms. A personal locator beacon is similar in purpose but is not the same expansion as EPIRB. A bridge-to-bridge transceiver is a marine radio used for ship-to-ship or ship-to-shore communications, not a distress beacon. A search and rescue transponder is a radar-responsive beacon used to aid responders, not the beacon you carry to alert rescuers.