单项选择题
As a vessel changes course to starboard，the compass card in a magnetic compass（）.
A.remains aligned with compass north B.also turns to starboard C.first turns to starboard then counterclockwise to port D.turns counterclockwise to port
单项选择题 A system of reservoirs and connecting tubes in a gyro compass is called a（）.
单项选择题 A single vertical magnet placed underneath the compass in the binnacle is used to compensate for（）.
单项选择题 A compass card without north-seeking capability that is used for relative bearings is a(n)（）.
