A.on the same course as your vessel
B.at the same speed as your vessel
C.on the same course and speed as your vessel
D.on a reciprocal course at the same speed as your vessel
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A.Separated line
B.Divided line
C.Reference line
D.Segregated line
A.at all times
B.in the bottom return mode
C.in the volume reverberation mode
D.only when there is no current
A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water
A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground
A.tree or log awash in a nearly vertical position
B.crew member who refuses to work
C.upstream end of a land wall
D.buoy that is adrift
最新試題
The number of pulses of energy transmitted per second is call the（）.
A barometer showing falling pressure indicates the approach of a（）.
Compass error is equal to the（）.
A Doppler log in the bottom return mode indicates the（）.
How is variation indicated on a small-scale nautical chart?（）.
An ECDIS is required to display which information?（）
An electronic depth finder operates on the principle that（）.
An ECDIS is required to display which information?（）
The radar component that produces the synchronizing signal and triggers the indicator sweep is which of the following?（）.
A radar range to a small，charted object such as a light will provide a line of position in which form?（）.