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What is the radiation pattern of the marker beacons?

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What is the radiation pattern of the marker beacons?

(a) Triangle

(b) Circle

(c) Square

(d) Fan shape

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Right option is (d) Fan shape

For explanation: Marker beacons provide pilot alerts along the approach path. Each beacon radiates a fan shaped vertical beam that is approximately ±40° wide along the glide path by ±85° wide perpendicular to the path.

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