High Quality Content by WIKIPEDIA articles! No. 54 Squadron (sometimes written as No. LIV Squadron) is a squadron of the Royal Air Force. It is a reserve squadron based at RAF Waddington, England. On 1 September 2005 it took on the role of Intelligence, Surveillance, Target Acquisition and Reconnaissance (ISTAR) Operational Conversion Unit, responsible for training all RAF crews assigned to the Sentry AEW1 and the Nimrod R1. The unit will also train crews of the Sentinel R1 when it comes into service. The squadron was previously a SEPECAT Jaguar strike fighter unit, operating from RAF Coltishall, until it was disbanded on 11 March 2005.