Which technology enables global search and rescue beacons to be detected by satellites?

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Multiple Choice

Which technology enables global search and rescue beacons to be detected by satellites?

Beacons that enable global search and rescue are designed to transmit on a 406 MHz signal that is monitored by the COSPAS-SARSAT satellite network. When such a beacon is activated, the 406 MHz signal is picked up by orbiting satellites and relayed to ground stations and rescue authorities around the world, allowing a rapid alert and location to be determined. Many modern beacons include GPS coordinates within the 406 MHz message, so rescuers can know the exact position right away. By contrast, VHF channel 16 is a marine voice distress channel and isn’t detected by satellites; NOAA weather satellites provide weather data to support SAR but don’t detect distress beacons; and a GPS ground network provides positioning on land or sea but does not broadcast beacon alerts to satellites.

Beacons that enable global search and rescue are designed to transmit on a 406 MHz signal that is monitored by the COSPAS-SARSAT satellite network. When such a beacon is activated, the 406 MHz signal is picked up by orbiting satellites and relayed to ground stations and rescue authorities around the world, allowing a rapid alert and location to be determined. Many modern beacons include GPS coordinates within the 406 MHz message, so rescuers can know the exact position right away. By contrast, VHF channel 16 is a marine voice distress channel and isn’t detected by satellites; NOAA weather satellites provide weather data to support SAR but don’t detect distress beacons; and a GPS ground network provides positioning on land or sea but does not broadcast beacon alerts to satellites.

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