Greenwich celestial meridian
hour circle of the body
local celestial meridian
vertical circle of the body
第1题：
A line of position from a celestial observation is a segment of a ______.
A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
第2题：
A time diagram is a diagram on the plane of the ______.
A.celestial meridian
B.celestial equator
C.celestial horizon
D.principal vertical circle
第3题：
在MApINfo中计算方位角的公式为：NloNg=LoNg+RAdiuS*COS(Pi()*Azimuth/180);NLAt=LAt+RAdiuS*(SIN(Pi()*Azimuth/180))。()
第4题：
______is an angle at which a cargo settles in the hold of a ship，between the horizontal and the slope made by a bulk cargo such as grain or iron ore．
A.Angle of loll
B.Angle of inclination
C.Angle of repose
D.Angle of list
第5题：
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called ______．
A.flux
B.poles
C.magnets
D.azimuth
第6题：
A time diagram is a diagram of the celestial sphere as observed from above the ______.
A.south celestial pole
B.north celestial pole
C.observer's meridian
D.Greenwich meridian
第7题：
In the navigational triangle，the angle at the elevated pole is the ______．
A.meridian angle
B.altitude
C.right ascension
D.azimuth angle
第8题：
Officers use sextants to observe ___天体____.
A.stars
B.celestial bodies
C.the sun
D.the moon
第9题：
The most accurate method of determining gyrocompass error while underway is by ______．
A.Comparing the gyro azimuth of a celestial body with the computed azimuth of the body
B.Comparing the gyro heading with the magnetic compass heading
C.Determining from the chart the course made good between celestial fixes
D.It cannot be determined accurately at sea due to drift of unknown currents
第10题：
Mariners proceeding across the main routes are recommended to do so at______．
A.as wide an angle as practicable
B.as wide an angle so practicable
C.like wide an angle as practicable
D.like wide as angle so practicable