circle of equal altitude
parallel of declination
parallel of altitude
vertical circle
第1题：
A line of position derived from a loran reading is a section of a(n) ______.
A.straight line
B.arc
C.parabola
D.hyperbola
第2题：
My position has been obtained ______ astronomical observation．
A.with
B.from
C.on
D.by
第3题：
The word“perception”(Line 2，Para．3)most probably means_____．（ ）
[A]observation
[B]standard
[C]performance
[D]understanding
第4题：
You are in the process of adding a barge to your tow．A line run from your power capstan and around timber heads on your tow is made fast on the new barge so that it can be pulled into position．This line is called a ______．
A.Scissors wire
B.Capstan line
C.Spring line
D.Fore and aft line
第5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6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7题：
A single line of position combined with a dead-reckoning position results in a(n) ______.
A.estimated position
B.assumed position
C.fix
D.running fix
第8题：
A line of position derived by radar range from an identified point on a coast will be a(n) ______.
A.straight line
B.arc
C.parabola
D.line parallel to the coast
第9题：
You are running parallel to the coast and take a running fix using bearings of the same object．If you are making less speed than used for the running fix，in relation to the position indicated by the fix，you will be ______．
A.Closer to the coast
B.Farther from the coast
C.On the track line ahead of the fix
D.On the track line behind the fix
第10题：
What is the difference between a CSU/DSU and a modem?（）