Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with ______.A.ship's clockB.engine movement recorderC.repeatersD.navigation lights
Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with ______.
A.ship's clock
B.engine movement recorder
C.repeaters
D.navigation lights
相关考题：
Which one of the followings is incorrect about magnetic compass?______.A.The magentic compass is compulsory on my vesselB.The magentic compass is prone to errorC.The magentic compass is always placed inside steel constructionsD.The magentic compass needs to be calibrated to compensate for local magnetic distortion
When stand－by before sailing, the duty engineer and officer should check clock, engine telegraph and rudder, and then write it in the0 A.engine room logbookB.vovage logbookc engine room logbook or voyage loglookD.engine room logbook and voyage logbook
As operator of a 199 GT towing vessel sailing foreign，it shall be your duty to enter in the Official Logbook or other permanent record ______.A.all information contained on the barge's Certificate of InspectionB.the condition of all towing gear to be usedC.all navigational aids to be usedD.the barges load line and draft readings
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west ________．A.Heeling magnetB.Flinders barC.Fore-and-aft magnetsD.All of the above can be set on magnetic east or magnetic west headings
Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism．These correctors are the ______．A.Fore-and-aft and athwartships magnetsB.Dip needle and heeling magnetC.Heeling magnet and Flinders barD.Flinders bar and quadrantal spheres
Deviation which is maximum on intercardinal compass headings may be removed by the ______．A.Flinders barB.Transverse magnetsC.Fore-and-aft magnetsD.Soft iron spheres on the sides of the compass
Deviation is the angle between the ______.A.true meridian and the axis of the compass cardB.true meridian and the magnetic meridianC.magnetic meridian and the axis of the compass cardD.axis of the compass card and the degaussing meridian
If a magnetic compass is not affected by any magnetic field other than the Earth’s which statement is TRUE?______.A.Compass error and variation are equalB.Compass north will be true northC.Variation will equal deviationD.There will be no compass error
Magnetic compass deviation______．A.varies depending upon the bearing usedB.is the angular difference between magnetic north and compass northC.is published on the compass rose on most nautical chartsD.is the angular difference between geographic and magnetic meridians
Magnetic heading differs from compass heading by______．A.compass errorB.true headingC.variationD.Deviation
单选题Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with（）.Aship's clockBengine movement recorderCrepeatersDnavigation lights
单选题The magnetic compass magnets are acted on by the horizontal component of the Earth’s total magnetic force. This magnetic force is GREATEST at the（）.Anorth magnetic poleBsouth magnetic poleCmagnetic prime vertical meridianDmagnetic equator
单选题If a magnetic compass is not affected by any magnetic field other than the Earth’s，which statement is TRUE? （）ACompass error and variation are equalBCompass north will be true northCVariation will equal deviationDThere will be no compass error
单选题One hour before sailing, the duty engineer and officer should check （）Atachometer and engine telegraphBoil and water reservesCclock and engine telegraph and test the rudderDcrews
单选题Deviation is the angle between the（）.Atrue meridian and the axis of the compass cardBtrue meridian and the magnetic meridianCmagnetic meridian and the axis of the compass cardDaxis of the compass card and the degaussing meridian
单选题The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.AdeviationBvariationCcompass errorDdip
单选题Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.AHeeling magnetBFlinders barCFore-and-aft magnetsDAll of the above can be set on magnetic east or magnetic west headings
单选题Variation in a compass is caused by（）.Aworn gears in the compass housingBmagnetism from the earth's magnetic fieldCmagnetism within the vesselDlack of oil in the compass bearings
单选题The principal purpose of magnetic compass adjustment is to（）.Areduce the variation as much as possibleBreduce the deviation as much as possibleCreduce the magnetic dip as much as possibleDallow the compass bowl to swing freely on its gimbals
单选题Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the（）.Afore-and-aft and athwartships magnetsBdip needle and heeling magnetCheeling magnet and Flinders barDFlinders bar and quadrantal spheres
单选题If the gyrocompass error is east，what describes the error and the correction to be made to gyrocompass headings to obtain true headings?（）AThe readings are too low (small numerically) and the amount of the error must be added to the compass to obtain trueBThe readings are too low and the amount of the error must be subtracted from the compass to obtain trueCThe readings are too high (large numerically) and the amount of the error must be added to the compass to obtain trueDThe readings are too high and the amount of the error must be subtracted from the compass to obtain true
单选题The magnetic compass operates on the principle that（）.Alike magnetic poles attractBunlike magnetic poles repelCunlike poles attractDthe poles of the compass line up with the geographic poles of the earth
单选题When stand-by before sailing, the duty engineer and officer should check clock, engine telegraph and rudder, and then write it in the （）Aengine room logbookBvoyage logbookCengine room logbook or voyage logbookDengine room logbook and voyage logbook
单选题The compass error of a magnetic compass that has no deviation is（）.AzeroBequal to variationCeliminated by adjusting the compassDconstant at any geographical location
单选题Magnetic compass deviation（）.Avaries depending upon the bearing usedBis the angular difference between magnetic north and compass northCis published on the compass rose on most nautical chartsDis the angular difference between geographic and magnetic meridians
单选题Deviation which is maximum on intercardinal compass headings may be removed by the（）.AFlinders barBtransverse magnetsCfore-and-aft magnetsDsoft iron spheres on the sides of the compass
单选题As operator of a 199 GT towing vessel sailing foreign，it shall be your duty to enter in the Official Logbook or other permanent record（）.Aall information contained on the barge's Certificate of InspectionBthe condition of all towing gear to be usedCall navigational aids to be usedDthe barges load line and draft readings