A. X-band radar

B. S-band radar

C. C-band radar

D. No radar can

61. [3910]Magnetic variation changes with a change in ______.

A. the vessel's heading

B. sea conditions

C. seasons

D. the vessel's position

62. [3818]Deviation is the angle between the ______.

A. true meridian and the axis of the compass card

B. true meridian and the magnetic meridian

C. magnetic meridian and the axis of the compass card

D. axis of the compass card and the degaussing meridian

63. [15]Which one of the followings is incorrect about magnetic compass?

A.The magentic compass is compulsory on my vessel

B.The magentic compass is prone to error

C.The magentic compass is always placed inside steel constructions

D.The magentic compass needs to be calibrated to compensate for local magnetic distortion

64. With respect to automatic identification systems(AIS) which of the following information is broadcast every one to ten seconds? A.Vessel’s draft B.Air Draft C.Navigational status

D.Dimensions of vessel

65. 123. In case of AIS overload, what can you expect?

A. AIS will shut down