单项选择题
（）means rudder to be held in the force and aft angles.
A.Steady B.Meet her C.Midships D.Stop engines
单项选择题 （）means check the swing of the vessel’s head in a turn.
单项选择题 1 nautical mile is the lenth of an arc of a great circle which subtends an angel of（）at the center of the Earth.
单项选择题 A ship is side to be（）when the whole ship moves bodily to port and then to starboard.
