Which frequency is designated for the older emergency locating beacon being phased out by COSPAS-SARSAT?

Which frequency is designated for the older emergency locating beacon being phased out by COSPAS-SARSAT?

• A. 121.5 MHz
• B. 156.525 MHz
• C. 2182 kHz
• D. 2187.5 kHz

Answer: (A)

The question tests the move from legacy analog distress beacons to satellite-enabled beacons. Beacons that were once used for locating a distressed transmitter operated on 121.5 MHz so ground teams could homing in on the signal. However, COSPAS-SARSAT satellites no longer monitor this frequency, so it’s being phased out in favor of modern beacons that transmit on 406 MHz with a unique ID, allowing instant satellite detection and more precise location data. That makes 121.5 MHz the designated frequency for the older emergency locating beacon being phased out. The other options correspond to different services and not to the legacy satellite-distress system: 156.525 MHz is a maritime VHF distress channel, and 2182 kHz / 2187.5 kHz are MF/HF distress bands used in non-satellite radio communication.

The question tests the move from legacy analog distress beacons to satellite-enabled beacons. Beacons that were once used for locating a distressed transmitter operated on 121.5 MHz so ground teams could homing in on the signal. However, COSPAS-SARSAT satellites no longer monitor this frequency, so it’s being phased out in favor of modern beacons that transmit on 406 MHz with a unique ID, allowing instant satellite detection and more precise location data. That makes 121.5 MHz the designated frequency for the older emergency locating beacon being phased out. The other options correspond to different services and not to the legacy satellite-distress system: 156.525 MHz is a maritime VHF distress channel, and 2182 kHz / 2187.5 kHz are MF/HF distress bands used in non-satellite radio communication.