A.full confirmation
B.precise appreciation
C.immediate assessment
D.timely recognition
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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
A.at close range
B.at end on situation
C.at head on situation
D.at crossing situation
最新試題
（）is not a component of GPS.
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.
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（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.
（）is not an alarm required by IMO standards to be available on the ECDIS.
The heading of a vessel is indicated by what part of the compass? （）
The line connecting the Loran-C master station with a secondary station is called the（）.
Which one of the followings does not limit the effective range of radar（）.
When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．