单项选择题
A.all mooring lines have a different tension
B.the leeward lines have higher tension than the windward lines
C.the maximum tension of the most heavily loaded line does not exceed the safe working load
D.all horizontal tension forces on the windward lines are no greater than the vertical tension forces
单项选择题 During severe storms when survival becomes a major concern，it may become necessary to relieve high anchor tensions on the windward side of the unit by（）.
单项选择题 A person suffering from possible broken bones and internal injuries should（）.
单项选择题 Do you require any further assistance?My ship is safe now and no assistance is necessary.This VHF communication generally takes place during（）.