A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?（）

A . If the quadrantal spheres are out as far as possible replace them with smaller spheres B . If the quadrantal spheres are in as far as possible remove one of the spheres C . If the quadrantal spheres are in as far as possible replace them with smaller spheres D . If the quadrantal spheres are out as far as possible，move the quadrantal spheres i

A . variation B . deviation C . compass error D . drift

A . The course change should be made rapidly to prevent transient induced magnetism while passing the intercardinal headings B . After the new heading is reached，the vessel should steam on that course for at least two minutes before the adjustment C . During the course change，you should gently tap the compass to remove any error caused by friction on the pivot bearing D . After steadying on the new heading，the compass card should be slewed by a magnet and allowed to oscillate freely to remove any gaussin error

A . Steady B . Meet her C . Midships D . Stop engine

A . the deviation has been offset by the variation B . there is something wrong with the compass C . the compass is being influenced by nearby metals D . there is no deviation on that heading

A . one sidelight B . one sidelight and a masthead light C . one sidelight and two masthead lights D . both sidelights of a vessel and her masthead light(s)

A . Move the quadrantal spheres closer to the compass B . Raise the heeling magnet if the red end is up C . Remove some of the Flinders bar D . Raise or lower the athwartship magnet

A . 60° B . 135° C . 180° D . 360&deg

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 heading

A . Add ballast in the afterpeak B . Add ballast forward C . Alter course D . Reduce speed

A . If the quadrantal spheres are all the way out，replace them with smaller spheres B . If the quadrantal spheres are all the way in，replace them with larger spheres C . If the quadrantal spheres are all of the way out，move the spheres in D . If the quadrantal spheres are all the way out，replace them with larger spheres.

A . compass error B . latitude C . variation D . deviatio

A . stop her engines B . alter course to starboard C . sound the danger signal D . back dow

A . apply the relevant Steering and Sailing Rules as a power-driven vessel B . apply the relevant Steering and Sailing Rules as a Sailing vessel C . apply the relevant Steering and Sailing Rules as a vessel not under command D . apply the relevant Steering and Sailing Rules as a vessel engaged in a towing operatio

A . Bow to the sea and no way on your vessel B . Sea on the lee quarter with ship moving ahead slowly C . Sea on the weather bow and ship moving ahead slowly D . Sea on the quarter with sternway on the shi

A . compass error B . variation C . magnetic dip D . deviatio

A . Effect of the propeller flow on the rudders B . Water flow due to the vessel's movement through the water C . Tunnel affect of the water flow past opposing rudders D . Discharge current being channeled to impinge on the vessel's deadwood

A . alter course to starboard and pass port to port B . alter course to port and pass starboard to starboard C . decide on which side the passage will occur by matching whistle signals D . slow to bare steerageway

A . one sidelight and the masthead light are visible B . the vessels will pass closer than half a mile C . both vessels sound one prolonged blast D . both sidelights and masthead light(s) are visible

A . being moored for a long time on one heading B . being struck by lighting C . steaming from the north magnetic hemisphere to the south magnetic hemisphere D . loading a homogenous magnetic cargo such as steel plate，iron bars，etc

A . Card B . Needle C . Lubber's line D . Gimbal

A . divisional parts B . coefficients C . fractional parts D . equatio

A . compass error B . true heading C . variation D . deviatio