Gyro Director Training Gear

Gyro Director Training Gear (often G.D.T. or GDT) was a Royal Navy innovation hit upon late in the war which revisited the means by which a ship would take bearings to a target and plot them on a Dreyer Fire Control Table. GDT arrived too late to see action in the war.^{[Citation needed]}

Prior Methods

Before the advent of GDT, a Royal Navy capital ship would take bearings to the target from either an Argo Rangefinder or from a Mark VII Dumaresq situated in the armoured hood, and these would be rectified by a gyro-compass before being plotted against time on

See Also

• Standard Bearing Plot
• Gunnery Director
• Dreyer Fire Control Table

Bibliography

• Admiralty, Gunnery Branch (1918). Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. C.B. 1456. Copy No. 10 at Admiralty Library, Portsmouth, United Kingdom.
• Admiralty, Gunnery Branch (1930). Pamphlet on the Mark III* Dreyer Table. O.U. 6196 (B). Copy at Admiralty Library, Portsmouth, United Kingdom.
• Admiralty, Gunnery Branch (1930). Pamphlet on the Mark IV* Dreyer Table. O.U. 6196 (C). Copy at Admiralty Library, Portsmouth, United Kingdom.
• Admiralty, Gunnery Branch (1930). Pamphlet on the Mark V Dreyer Table. O.U 6196 (D). Copy at Admiralty Library, Portsmouth, United Kingdom.
• Admiralty, Gunnery Branch (1930). Pamphlet on Turret Dreyer Table as Fitted in the Turrets of H.M. Battleships, and in the Transmitting Stations of Certain Cruisers. O.U. 6196 (A). Copy at Admiralty Library, Portsmouth, United Kingdom.