Oliver Hill Battery - Plotting Room Entry
Completed in November 1939, it was later extended to house the Fortress Plotter No.2, which was "associated with the installation of radar fire control equipment" (1). The facility was equipped with:
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Coordinate Converter No.2A MKIII,
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Table Fire Direction MKIIIB (1940)
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Battery plotting Room Switch (1938)
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Disc Predicting C.D. MKI (1936).
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In order to further train the Battery Commanders and staff attached to the Fire Control unit, a miniature practice counter bombardment range was constructed adjacent to the Plotting Room.
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1942 – Extensions of the Plotting Rooms at Oliver Hill take place to “house equipment associated with the introduction of radar fire control systems”.
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References
(1) The Coast Defences of Western Australia 1826-1963: A Study by R. K. Glyde for personal use (Printed 1991).