The Ilyushin IL-78 is an air-to-air refuelling tanker aircraft and it is just a modified IL-76. The tanker lets three aircraft be refueling in flight simultaneously from the UPAZ-1A (IL-78 ) / UPAZ-1M (IL-78M) 26m refuelling pods fitted to the outer wings and rear fuselage. The only noticed differences are just these pods.