GMDSS: Element 7

1. A Much lower noise level observed during daytime operation.
2. B No indication of power output when speaking into the microphone.
3. C When testing a radiotelephone alarm on 2182 kHz into an artificial antenna, the Distress frequency watch receiver becomes unmuted, an improper testing procedure.
4. D Failure to contact a shore station 600 nautical miles distant during daytime operation.

Tip: press A-D to answer