單項(xiàng)選擇題

While in drydock your vessel will be belt-gauged.This process involves（）.

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

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單項(xiàng)選擇題

Which statement about the gyrocompass is FALSE（）.

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

單項(xiàng)選擇題

Which statement about the Flinders bar of the magnetic compass is CORRECT（）.

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