Icom IC-M423 Instruction Manual page 45

Push [CALL] to transmit the Position Request Call.
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• If Channel 70 is busy, the transceiver stands by until the channel
becomes clear.
After the Position Request Call has been transmitted, the
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following screen is displayed.
When the acknowledgement call is received, beeps sound
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and the following screen is displayed.
Push [ALARM OFF] to stop the beeps, and then the screen
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as shown below is displayed.
Push [EXIT] to return to the normal operating mode.
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DSC OPERATION
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