Floating, not controlled, without a cl

1、For a floating vessel,true mean draft

For a floating vessel,true mean draft is always the（）.Aaverage of the observed draftsBdraft at the centre of flotationCdraft corresponding to the center of buoyancyDmetacentric height

2、The device that allows a floating ship

The device that allows a floating ship to sway without bending the marine riser system is the（）.Ayaw jointBsway jointCslip jointDflex or ball joint

3、For a floating vessel，the center of fl

For a floating vessel，the center of flotation is the point in the waterplane（）.Aabout which the vessel lists and trimsBwhich coincides with t...

4、A yellow signal，floating in the air fr

A yellow signal，floating in the air from a parachute，about 300 feet above the water，indicates that a submarine（）.Awill be coming to periscop...

5、A person on a fixed or floating platfo

A person on a fixed or floating platform engaged in oil exploration MAY discharge food waste into the sea when the distance from the nearest land is at least（）.A3 nautical milesB5 nautical milesC12 nautical milesD25 nautical mile

6、When taking soundings on a floating sh

When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.Areduce the time the sounding tube is open...