第1题
Loran-C is which type of navigation system ________.
A.Hyperbolic,long-range navigation system
B.Short-range electronic
C.Long-range,high frequency navigation system
D.Long-range,with a frequency of 1950 kHz
第2题
Loran-C is which type of system ________.
A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
第3题
The light characteristic of composite group flashing(2 + 1)is used in the Aids to Navigation System on the Western Rivers for lights on ().
A.the right descending bank
B.the left descending bank
C.preferred-channel buoys
D.daymarks with no lateral significance
第4题
______ is used for safety of navigation ship-to-ship.
A.channel 6
B.channel 13
C.channel 16
D.channel 70
第5题
A.ECDIS
B.RADAR
C.GPS
D.GMDSS
第6题
A.ECDIS
B.RADAR
C.GPS
D.GMDSS
第7题
A sling psychrometer is a(n) ______.
A.type of cargo gear
B.instrument used in celestial navigation
C.instrument used to measure relative humidity
D.instrument used to measure specific gravity
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