Australian Army Museum of Western Australia > Records

World War 2, Western Australia, Rottnest Island, Bickley, Fortress Plotting Room (Alternate). Layout, 1943

« Prev Item Next Item »

Subcollections

Coast Artillery Fire Control - Target and Projectile Coincidence

Overview

Layout diagram of Alternate Fortress Plotting Room at Bickley Point The Fortress Plotting Room construction at Oliver Hill commenced in late 1942 adjacent to the existing Oliver Hill battery plotting room. In 1943 it became operational along with a much simpler Alternate fortress Plotting Room at Bickley Point. The function of the Fortress Plotting Room was to determine the current position, course and speed of a ta4get using the data from distant fortress observation posts positioned throughout Rottnest Island. This information was relayed to the selected engaging battery in the Fortress system by means of head-breast phones

Historical information

A Fortress Plotting Room was where information about naval targets was received from Fortress Observation Posts, plotted and the required information extracted and then acted on. There are smaller plotting rooms associated with Bickley Battery which received information from the the Fortress Plotting Room and Battery Observation Posts.

Details

Registration number

cwa-org-32-54-644

Contextual Information

This entry is based on research, documentation and technical drawings prepared by John Mercer during many years as a leading member of the Rottnest Island Military Restoration Committee and the Defence Heritage Interpretation Plan Group.

Geotag

-32.008924476014, 115.54958854616

Open in Google Maps

Nearest geotagged records:

View all geotagged records »

Links to additional resources

Instrument - Fall of Shot Calculator

Instrument - Plotting Table No 1 Mk 1 (#38)

Australian Army Museum of Western Australia

Organisation Details
View Collection
Item Feedback