Aviation fuel One of the most important business activities at NIS is the supply of aircraft with aviation fuel, produced at the Pančevo Oil Refinery. Jet fuel produced by NIS is compliant with the relevant international and domestic standards. The certified laboratory integrated into the Aero Services facilities exclusively conducts aviation analyses. Using state-of-the-art equipment, the laboratory monitors all activities – from fuel reception and storage to fuel dispatch to tank trucks which refuel the aircrafts. NIS supplies almost all airlines flying to the Belgrade Airport, and Air Serbia, Aeroflot, Alitalia, Austrian Airlines, Etihad Airways, Lufthansa, Turkish Airlines, Qatar Airways are some of our biggest clients. NIS owns a state-of-the-art facility for storage and distribution of aviation fuel at Belgrade Airport, which is the best equipped facility of its kind in the region. NIS Aero Services meets strict supply standards regarding reliability and speed. This has been verified by high marks from the IATA international association, which controls all operational segments of air traffic. NIS offers the following types of jet fuel: Jet fuel Jet A-1 compliant with the Defence Standard 91-91/issue no. 7, produced at the Pančevo refinery Aircraft fuel (Avgas 100LL) compliant with the Defence Standard 91-90/issue no. 3, supplied to various airlines Airliners landing at Nikola Tesla Airport in Belgrade and Konstantin Veliki Airport in the city of Niš owned by air carriers which have no signed agreements with NIS can be re-fuelled if their pilots have credit cards issued by World Fuel Services or Master Card, Euro Card, American Express or Visa International payment cards.