GMDSS: Element 7

1. A No discernable traffic has been heard on the 2182 kHz during the radiotelephone silent periods.
2. B Failure to contact another station 60 miles distant during daytime operation.
3. C Dramatic decrease in noise level observed during night and early morning hours.
4. D The visual indication of power to the antenna fluctuates while testing the radiotelephone alarm signal generator into an artificial antenna.

Tip: press A-D to answer