Sea King HAS.1 converted to carry retractable Thorn-EMI Searchwater AEW radar extended on boom from starboard main door. 9 conversions.

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Technical data for Westland HAEW Mk.2

Crew: 4, main rotor diameter: 18.90m, fuselage length: 16.69m, height: 4.74m, take-off weight: 9500kg, cruising speed: 208km/h, hovering ceiling, OGE: 2500m, range with max fuel: 1200km, duration of patrol: 4-4.5h