 A human operator anticipates errors, and can also compensate for known lags in the operation of the system.Mimicking of this behaviour had been achieved for electronic signals and low-power electromechanical systems, but gun control was on a completely different scale, with machinery weighing tons and having significant inertia needing to move at velocities of up to 30 degrees per second, and accelerations of 10 degrees per second2.In 1937, the Admiralty had placed an order with Metropolitan Vickers for a control system for an eight-barrel Pom-Pom gun.