单项选择题
A.decrease in mooring line length B.increase in the opposite amperage C.increase in the opposite line tension D.decrease in mooring line tension and amperage
A.deck lights forward and aft B.a white light over two red lights C.a red light，white light，and blue light in a vertical line D.a distinctive signal promulgated by the CSS
A.the search has found nothing B.the derelict has been found C.the derelict has been located D.the derelict has been sighted