题目内容
The whole of the approach is defined and published in this way so that aircraft can land if they suffer from radio failure; it also allows instrument approaches to be made ____ at airports where air traffic control does not use radar or in the case of radar failure.
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Radar vector refers to the provision of headings on which the controller expects the pilot to ____ his aircraft.
The Instrument Landing System is used for the ____ approach.
In the case of the rarely-used Ground-Controlled Approach (GCA), the instrumentation (normally Precision Approach Radar) is on the ground and ____ by a controller.
Controller relays precise ____ for adjustment of heading and altitude to the pilot in the approaching aircraft.
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