A.measuring the thickness of the tail shaft liner
B.taking the vessel's offsets to check for hull deformation
C.testing and examining the anchor cables for defective links
D.drilling or sonic-testing the hull to determine the plate thickness
您可能感興趣的試卷
你可能感興趣的試題
A.Its accuracy remains the same at all latitudes
B.It seeks the true meridian
C.It can be used near the Earth's magnetic poles
D.If an error exists，it is the same on all headings
A.It compensates for the error caused by the vertical component of the Earth's magnetic field
B.It compensates for error caused by the heeling of a vessel
C.It compensates for quadrantal deviation
D.It is only needed in equatorial waters
A.Heeling magnet
B.Flinders bar
C.Fore-and-aft magnets
D.All of the above can be set on magnetic east or magnetic west headings
A.Quadrantal spheres
B.Heeling magnets
C.Flinders bar
D.Fore-and-aft magnets
A.The soft iron spheres on the arms of the binnacle
B.Magnets placed in trays inside the binnacle
C.A single vertical magnet beneath the compass
D.The Flinders bar
最新試題
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
What is an advantage of the magnetic compass aboard vessels?（）
What is the basic principle of the magnetic compass（）.
When relieving the helm，the new helmsman should know the（）.