A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target
您可能感興趣的試卷
你可能感興趣的試題
A.Bell alarm to warn the user
B.Lighted alarm signal to warn the user
C.Alternate signal keying system
D.View finder for each station
A.Less signal energy is necessary for receiver operation
B.More signal energy is available at the receiver
C.It significantly increases the peak power
D.It increases the signal capacity
A.Reflected electron
B.Electrical radiation
C.Quarterpoint electrical navigation
D.Hyperbolic radio navigation
A.only accurate during daylight hours
B.much less accurate
C.only accurate at twilight
D.more accurate than using ground waves
A.Skip zone
B.Blackout zone
C.Diffraction zone
D.Shadow zone
最新試題
To obtain accuracy in fixing by DF，（）and three stations should be used.
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（）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.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Radar makes the most accurate determination of the（）.
Would you mind（）your DF?
Which one of the followings does not limit the effective range of radar（）.
In using Loran-C，skywave reception gives greater range but is（）.
The operation of which aids to navigation may be suspended during war or national emergency（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.