The AH-64 Apache is an all-weather day-night military attack helicopter with a four-bladed main and tail rotor and a crew of two pilots who sit in tandem.
The UK operates a modified version of the Apache Longbow called the Westland WAH-64 Apache, and is designated Apache AH Mk1 by the British Army.

Westland has built 67 WAH-64 Apaches. British WAH-64 Apaches are using the Longbow Fire Control Radar in Afghanistan, saying that it improves situational awareness and avoidance of other aircraft during tactical maneuvers.

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