A.A mooring winchB.A windlassC.A deck craneD.A lifeboat……

单项选择题The original equilibrium position is stable when（）.

A.metacentric height is positive
B.metacentric radius is positive
C.KG exceed maximum allowable limits
D.Free surfaces are excessive

单项选择题Emergency escape breathing device on board shall have a duration of service no less than（）.

A.20 minutes
B.15 minutes
C.10 minutes
D.5 minutes

单项选择题All engines in lifeboats and rescue boats shall be run for a total period of not less than（）in weekly inspections.

A.2 minutes
B.3 minutes
C.4 minutes
D.5 Minutes

单项选择题The master shall ensure that any seafarers（）are provided with an adequate period of rest.

A.who have performed work for 14 hours
B.who have performed work in a scheduled rest period
C.who have performed work in a scheduled work period
D.who works hard

单项选择题The hatch at the after end of the canopy in a lifeboat（）the after lifting hook, painter, and tow line.

A.give access to
B.links up with
C.have contact with
D.is constructed of