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单选题
When using the radar for navigating（）.
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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更多 “单选题When using the radar for navigating（）.A the best fix is obtained by using a tangent bearing and a rangeB and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearingsC and using ranges，the most rapidly changing range should be measured lastD 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” 相关考题
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单选题The SART should provide a（）indication of its correct operation and should also inform survivors when it is interrogated by radar.A
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单选题You are underway in thick fog. You have not determined if risk of collision exists. Which statement is TRUE?（）.A
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考题
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考题
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考题
单选题A navigator fixing a vessel’s position by radar （）.A
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考题
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考题
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考题
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考题
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考题
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考题
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考题
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考题
单选题You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）A
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考题
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考题
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考题
单选题The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.A
immediately when the contact is noted on radarB
only if the radar scope is watched constantlyC
after the contact has been marked at least twiceD
by an occasional glance at the radar
考题
单选题When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.A
10 metersB
20 metersC
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考题
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on the same course as your vesselB
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on a reciprocal course at the same speed as your vessel
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navigating with a low diesel engine speedB
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考题
单选题When navigating in thick fog with the radar on，you should（）.A
station the look-out in the wheelhouse to keep a continuous watch on the radarB
secure the sounding of fog signals until a vessel closes within five milesC
station a look-out as low down and far forward as possibleD
keep the radar on the shortest available range for early detection of approaching vessels
考题
单选题When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）A
Immediately after floating freeB
After about one hour when the salt water activates the batteryC
Only when keyed by the radar of another vesselD
Only when daylight activates the photovoltaic cell
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