Item showing how The Vickers Predictor works with anti-aircraft guns to hit a moving target.
Titles read: "PREDICTIONS WHILE YOU WAIT!"
Various shots of a machine called the Vickers Predictor. Animated diagrams and live footage explain how the machine works to calculate the future position of a moving target. Connected to anti-aircraft guns, the machine enables the guns to be fired at the correct position to hit the moving aeroplane. Good shots of artillery guns being lined up, loaded and fired.