Gyro rate unit refers to a fire-control computer developed by the Royal Navy of the United Kingdom in 1937, and which was used extensively on British warships...

An inertial measurement unit (IMU) is an electronic device that measures and reports a body's specific force, angular rate, and sometimes the orientation...

systems. By 1940 the RN was adding a Gyro Rate Unit (GRU) which fed bearing and elevation data to a Gyro Rate Unit Box computer (GRUB), which also received...

000 rounds of 5-inch (127 mm) ammunition fired per kill. In 1940 the Gyro Rate Unit (GRU) was added to the HACS system, an analogue computer capable of...

A gyro gunsight (G.G.S.) is a modification of the non-magnifying reflector sight in which target lead (the amount of aim-off in front of a moving target)...

Sea Viper Sea Wolf Unrotated projectile - retired Fuze Keeping Clock Gyro rate unit HACS Hazemeyer gun mount Pom-Pom director Ikara - retired BL 7.5-inch...

reliability by eliminating some of the moving parts. Angular rate sensors called rate gyros measure the angular velocity of the vehicle. A strapdown system...

which, along with the Mk IV Pom-Pom Director, pioneered the use of the Gyro Rate Unit. The King George V design had four 0.5-inch quadruple machine gun mounts...

gyroscopic tachymetric fire-control for short range weapons – From 1940 Gyro Rate Unit – pioneered use of gyroscopic Tachymetric fire-control for medium calibre...

as six Mk IV pom-pom directors; all ten of these directors featured Gyro Rate Unit, tachymetric fire control. Duke of York and Howe had HACS Mk V directors...