The alarm signal followed by the Morse letter B on 2182 kHz indicates

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Multiple Choice

The alarm signal followed by the Morse letter B on 2182 kHz indicates

Explanation:
On the MF distress channel, an alarm signal followed by the Morse letter B is a standardized indication that an EPIRB is transmitting on 2182 kHz. The 2182 kHz frequency is dedicated to maritime distress and safety calls, and the Morse identifier helps responders recognize that the beacon in distress is an EPIRB actively transmitting on that frequency. Other frequencies correspond to different systems: 406 MHz EPIRBs are satellite-based, 121.5 MHz is an older distress frequency without this Morse-identification convention, and VHF Channel 70 is used for DSC—none of these are indicated by an alarm-plus-Morse B on 2182 kHz.

On the MF distress channel, an alarm signal followed by the Morse letter B is a standardized indication that an EPIRB is transmitting on 2182 kHz. The 2182 kHz frequency is dedicated to maritime distress and safety calls, and the Morse identifier helps responders recognize that the beacon in distress is an EPIRB actively transmitting on that frequency. Other frequencies correspond to different systems: 406 MHz EPIRBs are satellite-based, 121.5 MHz is an older distress frequency without this Morse-identification convention, and VHF Channel 70 is used for DSC—none of these are indicated by an alarm-plus-Morse B on 2182 kHz.

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