單項(xiàng)選擇題The correction to be applied to a Loran-C reading when matching a sky wave to a ground wave may be found（）.

A.on loran charts covering areas where sky waves are used
B.in the Radio Aids to Navigation，PUB 117
C.in the Loran-C Correction Tables
D.Sky waves cannot be matched to ground waves in LORAN-C to produce a usable reading


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1.單項(xiàng)選擇題The basic collision avoidance display presented by CASII is designed for easy interpretation and（）of possible collision threat situations.

A.full confirmation
B.precise appreciation
C.immediate assessment
D.timely recognition

2.單項(xiàng)選擇題Radar makes the most accurate determination of the（）.

A.direction of a target
B.distance to a target
C.size of a target
D.shape of a target

3.單項(xiàng)選擇題Radar is not only to obtain（），but also to measure their distance away from you.

A.brightness of objects
B.color of targets
C.shape of targets
D.bearing of objects

4.單項(xiàng)選擇題Most GPS receivers use the doppler shift of the carrier phase to compute（）.

A.Latitude
B.Longitude
C.Speed
D.Time

5.單項(xiàng)選擇題Magnets in the binnacles of magnetic compasses are used to reduce the effect of（）.

A.deviation
B.variation
C.local attraction
D.All of the above