Emergency Position-Indicating Radio Beacons (EPIRBs) and Personal Locator Beacons (PLBs) emit distress signals that can be tracked by satellites, helping rescuers find those in distress at sea.

• EPIRBs: Installed on vessels; they activate automatically when in water.
• PLBs: Personal devices worn by individuals for safety.
• Purpose: Provide precise location data for rescue operations in case of emergency.