A ship has been communicating effectively on 16 MHz during daylight hours with a shore station at a distance of 3500 miles. Toward late afternoon and evening what effect would be noticed?
Correct Answer
Communications should graduallydeteriorate and become impossible on this frequency at night.
Communications should be maintained with slight improvement in the signal received from the shore station.
The gray line effect will prevent communications after dark.
A ship at anchor has been communicating with a shore station approximately 200 miles distant on a frequency in the 4 MHz band through mid-morning. Toward the late afternoon and evening, what effect should be noticed?
Communications should be maintained with slight improvement in the signal received from the shore station.
Correct Answer
Communications should gradually improve and peak at night and earlymorning.
Communications should slowly deteriorate but may be continued throughout the night.
Communications should gradually deteriorate and become impossible on this frequency by night.