Deversoir Air Base (LG-209) is an active airbase of the Egyptian Air Force, known as 'Abu Sultan', located approximately 19 km south-southeast of Ismailia (Al Isma`iliyah); 116 km northeast of Cairo. It was formerly a major Royal Air Force airfield known as RAF Deversoir built before World War II. A helicopter unit with SA-342 Gazelle helicopters is based here.