Repeater
The Repeater was a British fire control data receiver placed in control positions aloft and in the Gun Control Tower[2] which displayed the enemy's relative course and inclination to the line of fire, enemy speed and range rate in use on the Dreyer Fire Control Table.[3]
These were likely used only in ships carrying Mark IV and Mark IV* and Mark V Dreyer tables, as these were the only ones featuring Electrical Dumaresqs with commutators in their unique centreworks to transmit enemy speed and inclination.[4]
The Dreyer Handbook alludes to a "rate transmitter on the Dreyer table"[5] providing the range rate signals, but none of its descriptions of the various tables allude to such a transmitter. They could have been bulkhead-mounted transmitters or one within electrical dumaresqs and their underslung range clocks.
The plate showing the device indicates that:[6]
- enemy speed was shown in knots by a cyclometric display
- enemy's relative course by a rotating pointer against inner ring
- enemy's inclination, by same pointer against outside ring
- range rate in yards per minute, up to +/- 2200 , seemingly by 25s
See Also
Footnotes
- ↑ Admiralty. Dreyer Table Handbook, 1918, Plate 33.
- ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 70.
- ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 8.
- ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 76. Plate 25.
- ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p 76.
- ↑ Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. Plate 25.
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.
