A semisubmersible rig under tow should be ballasted down if().
- Amotion begins to be excessive
- Bwater begins to break over the pontoons
- Cperiod of roll exceeds 12 seconds
- Dforward progress is halted by head wind
A semisubmersible rig under tow should be ballasted down if().
1、A semisubmersible with a negative GM f
A semisubmersible with a negative GM flops to an angle of().AheelBtrimClistDloll
2、On a semisubmersible ship,reserve buoy
On a semisubmersible ship,reserve buoyancy is increased by the presence of void spaces above the waterline in the().Asubmerged hullsBquartersCcolumns and upper structureDsubmerged connecting structure
3、On a long ocean tow,the bridle should
On a long ocean tow,the bridle should be made up of two equal lengths of().AchainBwireCnylonDmanila
4、A towing vessel should be on the crest
A towing vessel should be on the crest of a wave at the same time as its tow and in the trough at the same time. The term used to describe this is().Atow strainBcatenary lengthCbeing in stepDWilliamson's Tow
5、If a vessel under tow starts jumping o
If a vessel under tow starts jumping on its tow line,the most appropriate action to alleviate the condition is to().Achange courseBslow downCheave toDadjust tow line length
6、Under which two circumstances should S
Under which two circumstances should Spanning Tree Protocol be implemented?()A to ensure a loop-free topologyB to protect against user-side loop...