单项选择题
A.you must visually signal oncoming vessels
B.you must immediately tie up in the nearest port until the radiotelephone is repaired
C.you must anchor until the radiotelephone is repaired
D.the loss of the radiotelephone must be considered in navigating the vessel
单项选择题 If your bridge-to-bridge radiotelephone ceases to operate，you must（）.
单项选择题 If the ship sustains such damage that repairs are necessary，the master must put into the nearest port（）such repairs can be effected.
单项选择题 If the Certificate of Inspection of a damaged tank barge has expired，which certificate may be issued to allow its movement to a repair facility?（）