When crossing the magnetic equator the ______.
A.Flinders bar should be inverted
B.Heeling magnet should be inverted
C.The quadrantal spheres should be rotated 180°
D.Flinders bar should be moved to the opposite side of the binnacle
第1题:
When an azimuth of the Sun has been taken and the deviation of the standard magnetic compass computed,the watch officer should record the results ______.
A.in the vessel's Official Logbook
B.on the compass deviation card
C.in the compass deviation log
D.on a Napier diagram
第2题:
When relieving the helm,the new helmsman should know the ______.
A.Course per magnetic steering compass
B.Gyro error
C.Variation
D.Maximum rudder angle previously used
第3题:
If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism ______.
A.increases
B.remains the same
C.decreases
D.is unimportant and may be neglected
第4题:
north magnetic pole
south magnetic pole
magnetic prime vertical meridian
magnetic equator
第5题:
when the moon is new or full
when the moon and sun have declination of the same name
only when the moon and sun are on the same sides of the earth
at the beginning of spring when the sun is over the equator
第6题:
needles are nearly in line with the meridian
vessel is near the magnetic poles
variation is near zero
vessel is near the magnetic equator
第7题:
Stack weights should be less when using a solid bar lashing as compared to a wire lashing
Stack heights may be increased when using a solid bar lashing
Stack heights should be reduced when using a solid bar lashing
Solid bars should be used for lashing the first tier only,with wire lashings on the higher tier(s)
第8题:
eddies under the bar
swift current under the bar causing loss of control
cross-currents pushing the tow away from the bar
cross-currents pushing the tow into the bar
第9题:
Flinders bar should be inverted
Heeling magnet should be inverted
The quadrantal spheres should be rotated 180°
Flinders bar should be moved to the opposite side of the binnacle
第10题:
be shielded from direct sunlight
be locked into a constant heading
have any air bubbles replaced with nitrogen
have the compensating magnets removed
第11题:
Course per magnetic steering compass
Gyro error
Variation
Maximum rudder angle previously used
第12题:
the lines of force cross the equator on a 0°-180°alignment
the quadrantal error is 0°
there is no vertical component of the Earth's magnetic field
the intercardinal headings have less than 1°
第13题:
Which statement concerning the lashings of containers with solid bar or wire rope lashings is TRUE ________.
A.Stack weights should be less when using a solid bar lashing as compared to a wire lashing
B.Stack heights may be increased when using a solid bar lashing
C.Stack heights should be reduced when using a solid bar lashing
D.Solid bars should be used for lashing the first tier only,with wire lashings on the higher tier(s)
第14题:
You are about to go to sea and adjust the magnetic compass.To expedite the adjustment at sea,in what order should the following dockside adjustments be made ________.
A.Flinders bar first,then the heeling magnet and spheres
B.Heeling magnet first,then the Flinders bar and spheres
C.Flinders bar first,then the spheres and heeling magnet
D.Spheres first,then the Flinders bar and heeling magnet
第15题:
increases
remains the same
decreases
is unimportant and may be neglected
第16题:
It compensates for the error caused by the vertical component of the Earth's magnetic field
It compensates for error caused by the heeling of a vessel
It compensates for quadrantal deviation
It is only needed in equatorial waters
第17题:
always be nearer to the equator
always be nearer to the elevated pole
be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere
be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions
第18题:
you should make an ample change to port for a vessel crossing on the starboard bow
You should maneuver in ample time if a close-quarters situation is developing
You should determine the course and speed of all radar contacts at six minutes intervals
Long-range scanning will provide early warning of all other vessels within the radar’s range
第19题:
we should not worry about the transition of the Earth’s magnetic field
the Earth’s magnetic field will not change for at least 2000 years
the Earth’s magnetic field has decreased its strength rapidly
the transition of the Earth’s magnetic field can be controlled by modern science
第20题:
Flinders bar first,then the heeling magnet and spheres
Heeling magnet first,then the Flinders bar and spheres
Flinders bar first,then the spheres and heeling magnet
Spheres first,then the Flinders bar and heeling magnet
第21题:
the best fix is obtained by using a tangent bearing and a range
and using two radar ranges for a fix,the objects of the ranges should be close to reciprocal bearings
and using ranges,the most rapidly changing range should be measured last
and crossing a radar range of one object with the visual bearing of a second object,the two objects should be 80°to 110°apart
第22题:
low water slack
high water slack
high water ebb
high water flood
第23题:
before correcting for any deviation
after correcting for variation
after adjusting the fore-and-aft and athwartships permanent magnets
before the quadrantal correctors are placed on the compass