What type of device sends a distress radiobeacon during an accident?

The correct answer is the Emergency Position Indicating Radio Beacon (EPIRB). An EPIRB is a device specifically designed for use in maritime environments, and it automatically transmits a distress signal when activated, particularly in cases of emergencies such as capsizing or sinking of a vessel. This distress signal is sent to satellite systems, enabling search and rescue operations to quickly locate the source of the emergency.

EPIRBs play a vital role in enhancing maritime safety by providing a reliable means of alerting rescue authorities to a life-threatening situation. The device not only transmits positional information but also includes features that make it detectable by satellites and rescue agencies, thereby greatly increasing the chances of a successful rescue.

Other devices mentioned are related but have different functions. For instance, Personal Locator Beacons (PLBs) are designed for personal use and are suitable for land activities, whereas Local User Terminals (LUTs) and Mission Control Centers (MCCs) are part of the infrastructure that processes the signals from emergency beacons rather than sending distress signals themselves.