 On 19 October 1943, Shorts received the "Instruction to Proceed" and an order for three prototypes designated Sturgeon S.1, with military serials "RK787", "RK791" and "RK794" assigned.The final tailored S.11/43 requirements followed in February 1944.The pilot's cockpit was a sub-assembly bolted to the front of the spar, placing him level with the leading edge if the wing, the navigator was behind the centre section of the wing and the radio operator — separated from the navigator by his equipment — behind him.