单项选择题
A.Entrance buoy B.New buoy C.Port buoy D.Cardinal buoy
A rock and sand structure extending from the bank of th...
单项选择题A rock and sand structure extending from the bank of the river toward the channel is known as a（）.
A.wingdam B.towhead C.cutoff D.landwall
A relative bearing is always measured from（）.A.true nor...
单项选择题A relative bearing is always measured from（）.
A.true north B.magnetic north C.the vessel's beam D.the vessel's head
A preferred-channel buoy will show a（）.A.white light wh...
单项选择题A preferred-channel buoy will show a（）.
A.white light whose characteristic is Morse (A) B.group-occulting white light C.composite group-flashing (2 + 1) white light D.composite group-flashing (2 + 1) red or green light
