Pom-Pom director

The Vickers 40 mm QF 2 pounder "Pom-Pom" gun anti-aircraft mounting was introduced to the Royal Navy in the early 1930s.

It was, therefore, essential to aim the mount from a remote location, using a director that had a clear view, free from smoke and vibration.

The gun crew would then move the mount to match the pointers rather than having to try and aim at the target aircraft.

[1] These directors began to appear on Royal Navy cruisers, battleships and aircraft carriers in 1930.

[3] The Mk IV director was a considerable improvement and used gyroscopes in a gyro rate unit coupled to an optical rangefinder and Type 282 radar to determine the range, speed and direction of enemy aircraft and then used an on-director computer to produce an accurate fire control solution to hit the target.

Mark IV Directors on HMS King George V . The large rectangular box centred above the director contains the gyro rate unit. This image was taken early in King George V' s career before the addition of Type 282 radar .