 Westland also manufactured SAR versions of the Sea King for the Royal Norwegian Air Force , the German Navy and the Belgian Air Force . On SAR variants , the cabin was enlarged by a stretch of the fuselage behind the door ; another key feature , used for additional flotation in the unusual event of a water landing , inflatable buoyancy bags were housed inside the aircraft 's sponsons . Upgrades and changes made to SAR Sea Kings include the addition of radar warning receivers , a cargo hook for the underslung carriage of goods , and the redesigning of the cockpit for compatibility with night vision goggles . 
