A.at close range
B.at end on situation
C.at head on situation
D.at crossing situation
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A.to get
B.to approach
C.to proceed
D.to close
A.hard iron
B.soft iron
C.vertical iron only
D.horizontal iron only
A.Rhythm
B.Period
C.Intensity
D.Color
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
最新試題
To obtain accuracy in fixing by DF，（）and three stations should be used.
The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of（）.
The heading of a vessel is indicated by what part of the compass? （）
Which one of the followings does not limit the effective range of radar（）.
The loran lines drawn on navigation charts represent（）.
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.
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 information received by AIS will be displayed on（）.
With respect to automatic identification systems（AIS），which information is required to be broadcast every 1 to 10 seconds（）.
Would you please（）on the radar?