The frequency 406/121.5 MHz is common to which EPIRB categories?

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Multiple Choice

The frequency 406/121.5 MHz is common to which EPIRB categories?

Explanation:
The key idea is how EPIRB categories handle distress signaling. Both Cat I and Cat II beacons are designed to broadcast a 406 MHz distress signal that is detected by satellites, and they also emit a 121.5 MHz homing signal to help rescuers locate the beacon on scene. Cat I activates automatically when it hits water, while Cat II requires manual activation, but they share this same 406/121.5 signaling pattern. Other categories use different configurations, so the 406/121.5 pairing is characteristic of Cat I and Cat II.

The key idea is how EPIRB categories handle distress signaling. Both Cat I and Cat II beacons are designed to broadcast a 406 MHz distress signal that is detected by satellites, and they also emit a 121.5 MHz homing signal to help rescuers locate the beacon on scene. Cat I activates automatically when it hits water, while Cat II requires manual activation, but they share this same 406/121.5 signaling pattern. Other categories use different configurations, so the 406/121.5 pairing is characteristic of Cat I and Cat II.

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