That brought back memories! I was lucky enough to visit the site back in '71 whilst on a 'Firq/Saiq' run with 78 Sqn Wessex, based in Sharjah. As I remember, the grave is a simple concrete plaque with a cross on it, just off the end of one of the runways at Saiq Intnl, (well it was a 3 dirt runway airfield in those days)