航海英语航海学基本知识章节练习(2017.11.02)

单项选择题
A great circle track provides the maximum saving in distance on（）.
A.easterly courses in high latitudes
B.southerly courses in high latitudes
C.westerly courses in low latitudes
D.easterly courses in low latitudes that cross the equator
单项选择题
A plane that cuts the Earth’s surface and passes through the poles will always form（）.
A.the equator
B.a loxodromic curve
C.a small circle
D.a meridian
单项选择题
A preferred-channel buoy may be（）.
A.lettered
B.spherical
C.showing a white light
D.All of the above
单项选择题
A vessel is（）when she is not at anchor，made fast to the shore，or aground.
A.underway
B.making way
C.dead in the water
D.a power driven vessel
单项选择题
A light that has a light period shorter than its dark period is described as（）.
A.flashing
B.pulsating
C.occulting
D.alternating
单项选择题
A relative bearing is always measured from（）.
A.true north
B.magnetic north
C.the vessel's beam
D.the vessel's head
单项选择题
A spherical buoy may be（）.
A.numbered
B.lettered
C.green
D.red
单项选择题
A plane that cuts the Earth’s surface at any angle and passes through the center will always form（）.
A.the equator
B.a great circle
C.a small circle
D.a meridian
单项选择题
An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol? （）
A.Open-faced diamond
B.Diamond with a cross
C.Circle
D.Rectangle
单项选择题
A line on the Earth parallel to the equator is a（）.
A.gnomonic curve
B.small circle
C.meridian
D.great circle