Two EPIRB types are employed in the GMDSS system: which systems are used?

Two EPIRB types are employed in the GMDSS system: which systems are used?

• A. The COSPAS-SARSAT satellite system using 406 MHz and 121.5 MHz and The satellite L band (1.6 GHz) operating with the INMARSAT communications system
• B. GPS and Galileo satellites
• C. NAVSTAR and GLONASS
• D. Iridium and INMARSAT

Answer: (A)

In GMDSS, EPIRB distress signaling relies on two satellite networks. The first is the COSPAS-SARSAT system, which uses 406 MHz beacons to send distress alerts that are received by satellites and relayed to rescue coordination centers (with 121.5 MHz used as a homing signal to help rescuers locate the beacon). The second is the INMARSAT satellite communications system, operating in the L-band around 1.6 GHz, which handles distress alerts and provides ship-to-shore communications for coordinating the response. Navigation satellite constellations like GPS, Galileo, NAVSTAR, or GLONASS are not used for EPIRB distress signaling, and Iridium is not part of the standard GMDSS EPIRB setup.

In GMDSS, EPIRB distress signaling relies on two satellite networks. The first is the COSPAS-SARSAT system, which uses 406 MHz beacons to send distress alerts that are received by satellites and relayed to rescue coordination centers (with 121.5 MHz used as a homing signal to help rescuers locate the beacon). The second is the INMARSAT satellite communications system, operating in the L-band around 1.6 GHz, which handles distress alerts and provides ship-to-shore communications for coordinating the response. Navigation satellite constellations like GPS, Galileo, NAVSTAR, or GLONASS are not used for EPIRB distress signaling, and Iridium is not part of the standard GMDSS EPIRB setup.