Northbrook, IL -- (SBWIRE) -- 10/25/2021 -- Air-to-air refueling is a method of transferring fuel from one aircraft to another in mid-air. The fuel transferring aircraft is known as the tanker, while the receiving aircraft is known as the receiver. This process is primarily adopted by military personnel. Air-to-air refueling comprises mainly two systems: probe-and-drogue system and boom refueling system. The probe & drogue system consists of a refueling hose, a hose-end coupling, and a drogue.