A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
您可能感興趣的試卷
你可能感興趣的試題
A.fore-and-aft and athwartships magnets
B.dip needle and heeling magnet
C.heeling magnet and Flinders bar
D.Flinders bar and quadrantal spheres
A.Decreasing loran readings on 9960-W
B.Visual bearings of Montauk Point Lt. changing to the left
C.Increasing bearings of Southeast Point Light
D.Decreasing soundings
A.enter a traffic separation zone
B.cross a submerged pipeline
C.depart a regulated area
D.depart a restricted area
A.spider element
B.sensitive element
C.link arm
D.pickup transformer
A.VHF
B.Steering Gear
C.Rudder Indicator
D.Loran
最新試題
The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with（）.
Which of the following statements is TRUE regarding automatic identification systems（AIS）（）.
The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．
Which of the following statements is TRUE regarding crane operations（）.
Would you mind（）your DF?
To obtain accuracy in fixing by DF，（）and three stations should be used.
（）is not a factor which will affect the accuracy of GPS receiver.
The loran lines drawn on navigation charts represent（）.
With respect to automatic identification systems（AIS），which information is expected to be broadcast every 1 to 10 seconds（）.
The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.