A.Switch
B.To switch
C.Switched
D.Will switch
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A.My using
B.I use
C.To use
D.I will use
A.Rate of turn
B.Latitude and longitude
C.Navigational status
D.All of the above
A.Call sign and IMO number
B.Course over ground and MMSI
C.MMSI number and call sign
D.Route Plan and navigational status
A.A decreasing reading on loran pair 9960-X
B.The bearing of Wolf Trap Light changing to the right
C.Increasing soundings
D.The bearing of Wolf Trap Light changing to the left
A.It cannot be used in all parts of the world
B.There are 12 functioning GPS satellites at present
C.It may be suspended without warning
D.Two position lines are used to give a 2D fix
最新試題
Loran-C uses the multiple pulse system because（）.
Automatic identification systems（AIS）are required to（）.
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
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 heading of a vessel is indicated by what part of the compass? （）
To obtain accuracy in fixing by DF，（）and three stations should be used.
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（）.
Most modern Loran-C receivers，when not tracking properly，have a（n）（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.