controlling obstacle

controlling obstacle

[kən′trōl·iŋ ′äb·sti·kəl]
(navigation)
In terminal instrument procedures, the highest obstacle relative to a prescribed plane within a specified area; in precision approach procedures where obstacles penetrate the approach surface, the controlling obstacle is the one which results in the requirements for the highest decision height.
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References in periodicals archive ?
Holidaymakers will compete against each other in extreme stunts and the audience get in on the act too - blasting contestants with water and controlling obstacles on stage.