Which of the following statements concerning satellite EPIRBs is true?

The statement regarding satellite EPIRBs (Emergency Position Indicating Radio Beacons) that is true emphasizes their primary function: once activated, they transmit a signal that is crucial for vessel identification and position determination.

EPIRBs are designed to enhance maritime safety by automatically sending out distress signals that include GPS coordinates, allowing search and rescue teams to locate distressed vessels quickly and efficiently. Upon activation, the device transmits its unique identifier along with location data to satellite systems that relay this information to rescue coordination centers. This capability is vital in emergency situations, particularly in vast oceanic waters where visibility and communicative resources may be limited.

Understanding the role of EPIRBs helps to clarify why the other statements may not hold true. For instance, while they may be used in coastal areas, their functionality is by no means limited to just those regions. They operate anywhere there is satellite coverage. Furthermore, EPIRBs are intended solely for distress signaling and do not support two-way communication. Lastly, though some models may require manual activation, many modern EPIRBs feature automatic activation options that trigger upon submersion in water, further reinforcing the importance of their design for emergency situations.