Towberless pushback operation of a passenger aircraft is generally done with at least 2 people. The first person (walk-out assistant) communicates with the cockpit crew members and observes the mobility on the ground while the second person steers the pushback tractor and maneuver the aircraft, observing the mobility on the ground. According to local airport rules or company procedures, wing tip observers may also be deployed on the wing tips.
In order to save manpower and increase productivity, it is seen that some handling companies/airlines have started to perform push-back operations with single man(single man push-back) for a while.
Is it safe for a single person to perform the towberless pushback operation, both maneuvering the aircraft on the ground and communicating with the cockpit crew members and what can be the disadvantages of doing so? What kind of safety systems do these towberless tractors equipped with?