A.radar
B.DF
C.Satellite Navigator
D.Automatic Omega Navigator
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A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
A.the deviation has been offset by the variation
B.there is something wrong with the compass
C.the compass is being influenced by nearby metals
D.there is no deviation on that heading
A.The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true
B.The readings are too low and the amount of the error must be subtracted from the compass to obtain true
C.The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true
D.The readings are too high and the amount of the error must be subtracted from the compass to obtain true
A.compass error
B.true heading
C.variation
D.deviation
A.trouble
B.error
C.wrong
D.mistake
最新試題
The number of pulses of energy transmitted per second is call the（）.
An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer’s vessel. Which of the following is NOT a characteristic of indirect echoes?（）.
（）should be used during the poor visibility if the radar’s screen shows heavy sea returns.
How is variation indicated on a small-scale nautical chart?（）.
You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
An ECDIS is required to display which information?（）
What will NOT induce errors into a doppler sonar log?（）
（）the canal transit，the radar was operating.
A radar display in which North is always at the top of the screen is a(n)（）.
A barometer showing falling pressure indicates the approach of a（）.