单项选择题
A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG（center of gravity）off center
单项选择题 A crew member has just fallen overboard off your port side．Which action should you take （）.
单项选择题 A certificated lifeboatman assigned to command the lifeboat should（）.
单项选择题 （）outlines the Admiralty method of Harmonic tidal analysis for long and short observation periods plus a volume on datums for hydrographic surveys.