Repeater

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The Repeater[1]
Xerox copy thanks to Bill Schleihauf.

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

  1. Admiralty. Dreyer Table Handbook, 1918, Plate 33.
  2. Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 70.
  3. Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 8.
  4. Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p. 76. Plate 25.
  5. Handbook of Captain F. C. Dreyer's Fire Control Tables, 1918. p 76.
  6. 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.