Redcliff Position Finding Station was authorized on 27th February 1890 and work commenced on the 23rd April 1890. The construction of the five cells was completed by 31st January 1891. The total cost of construction was £403, some £68 under the estimated total. Cell I, the closest to Redcliff Battery, was designated as the transmitting cell, the other four cells, (Number 2 to 4) were all allocated to Sandown Fort.
The individual cells were the usual cut and cover construction with an iron girders over the top with corrugated iron and then a layer of soil. Except for Cell 1 (transmitting), the other four cells all had the usual plotting table with three legs.








