默认题库 - 地文航海

单选题

You should plot your dead reckoning position（）.

A. From every fix or running fix
B. From every estimated position
C. Every three minutes in pilotage waters
D. Only in pilotage water

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单选题

When latitude and longitude are used，these shall be expressed in（）（and decimals of a minute if necessary），north or south of the Equator and east or west of Greenwich.

A. Fathoms and meters
B. Miles and kilometers
C. Arc and degrees
Degrees and minute

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单选题

What is a lighted safe water mark fitted with to aid in its identification（）.

A spherical topmark
B. Red and white retroreflective material
C. A sequential number
D. A red and white octago

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单选题

The recording fathometer produces a graphic record of the（）.

A. bottom contour only up to depths of 100 fathoms
B. depth underneath the keel against a time base
C. contour of the bottom against a distance base
D. depth of water against a distance base

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单选题

Depiction of TSS's on charts uses（）as the primary color.

A. magenta
B. deep red
C. bright red
D. red

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单选题

（） is not likely to be a methods of Traffic Separation.

A. Separation of opposing streams of traffic by separation zones or lines
B. The separation of through traffic from local traffic by provision of inshore traffic zones
C. Division of traffic from several different direction into sectors
D. Control of routing traffic through shipping route

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单选题

（） is a circular traffic lane used at junctions of several routes，within which traffic moves counterclockwise around a separation point or zone.

A. Traffic Lane
B. Roundabout
C. Inshore Traffic Zone
D. Two-way Route

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单选题

（）is the process by which the position of the vessel at any moment is found by applying the last well-determined position to the run that has been made since，using for this purpose the ship’s course and the distance being those indicated by log.

A. dead reckoning
B. dead weight
C. dead slow ahead
D. dead slow aster

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单选题

A buoy marking a wreck will show a(n)（）.

A. white light FL (2) and a topmark of 2 black spheres
B. occulting green light and may be lettered
C. yellow light and will be numbered
D. continuous quick white light and may be numbered

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单选题

At the magnetic equator there is no induced magnetism in the vertical soft iron because（）.

A. the lines of force cross the equator on a 0°-180°alignment
B. the quadrantal error is 0°
C. there is no vertical component of the Earth's magnetic field
D. the intercardinal headings have less than 1&deg

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