Tall's Helm Indicator

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Tall's Helm Indicator, c. 1886[1]

Tall's Helm Indicator was an electrical shipboard transmitter/receiver pair which provided a visual indication of the tiller position.

It, and a companion Tall's Engine Room Telegraph were derived from a distance indicator first seen in 1885.[2]

It was being evaluated alongside other electrical designs in 1886.[3]

Design and Evaluation

Tall's Helm Indicator was evaluated in 1886 alongside his almost identical engine room telegraph and similar instruments from Lieutenant Lloyd, a Mr. Gisborne, Messieurs Lane and Farquharson, those of Inflexible and Colossus patterns.

The engine room and helm indicators improved upon the design of Tall's earlier range instruments, and had only three wires running between the transmitter and receiver.

See Also


  1. Annual Report of the Torpedo School, 1886. Plate 22.
  2. Annual Report of the Torpedo School, 1885. p. 75.
  3. Annual Report of the Torpedo School, 1886. p. 87.


  • H.M.S. Vernon. Annual Report of the Torpedo School, 1886. Copy 92 at The National Archives. ADM 189/6.