試題詳解

39. Please refer to the chart as attached and answer to the following two questions: The symbol at Q4 means: 
(A)Wreck, depth unknown, which is considered dangerous to surface navigation
(B)Wreck, depth unknown, which is not considered dangerous to surface navigation
(C)Wreck showing any part of hull or superstructure at the level of Chart Datum
(D)Wreck of which the mast(s) only are visible at Chart Datum