This piece of equipment was used to predict the flight path of an aircraft in order for anti-aircraft artillery to fire accurately at an approaching enemy airborne target. A crew of six operated the machine with information ready to be relayed to a gun within 50 seconds. The predictor was manufactured at the Commonwealth Government Ordnance Factory, Maribyrnong.The item is made primarily from metal, is square shaped and bolted to a wooden base. Numerous hand operated wheel dials attached to gauges which input information related to wind speed, bearings and elevation are visible. Each of the four sides has a specific task with three sides being labelled - Elevation Unit, Wind Calculator, Bearing Unit. The item is housed in a glass and wood display case. Attached to the front of the display case: 'VICKERS A.A. PREDICTOR No1 MK III MANUFACTURED BY ORDNANCE FACTORY MARIBYRNONG'pedictor, military equipment, ordnance, anti-aircraft guns