The radar equipped aircraft provides battlefield and ground surveillance in a similar role to the AmericanJSTARS aircraft.
The first production Sentinel R1 made its 4.4 hour maiden flight on May 26, 2004. The initial operating capability will be achieved in 2005.
Until 2003, the squadron flew the Tornado F3 and with this aircraft it was the first RAF squadron (accompanied by No. 29 Squadron) to be deployed as part the UK's contribution to the Gulf War.