单项选择题

When will the float-free emergency position indicating radiobeacon be activated after abandoning ship? （）

A.Immediately after floating free
B.After about one hour when the salt water activates the battery
C.Only when keyed by the radar of another vessel
D.Only when daylight activates the photovoltaic cell

<上一题目录下一题>

热门试题

单项选择题

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

单项选择题

When using the ARPA in heavy rain，which action should you take? （）

A.Increase the radar gain to pick up weak echoes through the rain
B.Increase the STC setting to reduce close-in spurious signals
C.Navigate as though the effective range of the radar has been reduced
D.Increase the range of the inner and outer guard rings