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
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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
A.deviation
B.variation
C.local attraction
D.All of the above
最新試題
If the radio signal ground wave extends out for less distance than the minimum skywave distance，there is an area in which no signal is received．This is called the（）.
Which one of the followings does not limit the effective range of radar（）.
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（）.
The information received by AIS will be displayed on（）.
The heading of a vessel is indicated by what part of the compass? （）
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
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.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.