A、should never use radar bearings
B、should only use radar bearings when the range exceeds the distance to the horizon
C、can use radar information from one object to fix the position
D、must use information from targets forward of the beam
更多“A navigator fixing a vessel’s position by radar （）.”相关的问题
A、leaked into navigable waters B、poured into navigable waters C、pumped into navigable waters through a fixed piping system D、all of the above
A、While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracy B、The satellites are in equatorial orbits around the earth about 60°of longitude apart C、The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satellite D、The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking
A、can use radar information from one object to fix the position B、should never use radar bearings C、should only use radar bearings when the range exceeds the distance to the horizon D、must use information from targets forward of the beam
A、A flashing light combined with a fixed light of greater brightness B、Light flashes combined in groups，with a different number of flashes in each group C、A light showing groups of two or more flashes at regular intervals D、A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
A、To navigate intentionally B、To navigate intensely C、To navigate carefully D、To navigate completely
A、To navigate intentionally B、To navigate intensely C、To navigate carefully D、To navigate completely
A、the best fix is obtained by using a tangent bearing and a range B、and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings C、and using ranges，the most rapidly changing range should be measured last D、and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart
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