試題詳解

29. 12-hour gale warning is valid from 200630 UTC APR 2020. From this message, the warning is expected to be valid from what date and time?
(A) 2006 UTC, APR 30th
(B) 0630 UTC, APR 20th
(C) 2020 UTC, APR 30th
(D) 1200 UTC, APR 20th