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?

Correct Answer: Option D — Communications should gradually improve and peak at night and early morning.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Communications should gradually improve and peak at night and early morning..