The twin-engine aircraft was designed with a watertight boat-like bottom fuselage as can be discerned in this photograph to allow them to land and float in mild sea conditions. Due to the deletion of the amphibious capability, the most noticeable change from the Sea King was the deletion of the side floats, the main undercarriage being carried on stub sponsors. Above the right-hand-side fuselage door is a rescue hoist.
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The Sea King series helicopter shown here during a training exercise had an overall length of 72ft 8in / 22.1488 meters and a height of 16ft 9in / 5.1054 meters. Empty they weighed 9,762lb / 4.42t and had a maximum take-off weight of 21,000lb / 9.525t. Top speed was166 mph / 267.15 km/h with a range of 621 miles / 999.40 kilometers. They had a service ceiling of 14,700ft / 4.48056 kilometers. In the transport role, the fuselage could accommodate up to twenty-eight passengers
