MERSAR is replaced by（）.

A.not under command
B.restricted in her ability to manoeuvre
C.restrained by her draught
D.underway

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

A.fire a green star to the left
B.send the letter K by light and point to the left
C.place an orange signal to your left as you signal with a white light
D.send the code signal S followed by L