A ship at anchor has been communicating marginally with a shore station approximately 200 miles distant on a frequency in the 4 MHz band periodically throughout the day. Toward the late afternoon and evening, what effect should be noticed? |
A) Communications should be maintained with slight improvement in the signal received from the shore station. |
B) Communications should slowly deteriorate but may be continued throughout the night. |
C) Communications should gradually deteriorate and become impossible on this frequency by night. |
D) Communications should gradually improve and peak at night and early morning. |