A.Card
B.Needle
C.Lubber's line
D.Gimbals
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A.on loran charts covering areas where sky waves are used
B.in the Radio Aids to Navigation，PUB 117
C.in the Loran-C Correction Tables
D.Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading
A.full confirmation
B.precise appreciation
C.immediate assessment
D.timely recognition
A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
A.brightness of objects
B.color of targets
C.shape of targets
D.bearing of objects
A.Latitude
B.Longitude
C.Speed
D.Time
最新試題
（）is not a factor which will affect the accuracy of GPS receiver.
The（）transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
When your vessel is proceeding to the area of traffic density，（）is used to determine the exact ranges of other ships or objects in the vicinity.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
Which statement concerning GPS is TRUE（）.
While you are at anchor，what will serve as a positive warning that you are drifting towards the wrecks located to the NW and SW of your 2215 position（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.