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World War 2, Western Australia, Rottnest Island, Coast Artillery Instrumentation, Decoder - Fall of Shot Mk 2
1939 - 1945Overview
Decoder – Fall of Shot Mk 2 – A box-like instrument with a transparent circular fce similar to a clock face. The battery Commander set the instrument to the engaging range and bearing so the fall of shot could be observed. Distance from target in hundreds of yards was noted with Hits, Straddles and near Misses recorded by special code letters. Based on this date, the Battery Commander would order the spotting corrections to the battery plotting room.
Details
Details
Registration number
cwa-org-32-54-693
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.
Year
Geotag
-32.006182686498, 115.5032922981
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Nearby places: View all geotagged records »
Open in Google Maps
Nearest geotagged records:
- World War 2, Western Australia, Rottnest Island, Coast Artillery Instrumentation, Depression Position Finder Type T Mk2 (0km away)
- World War 2, Western Australia, Rottnest Island, Coast Artillery Instrumentation, Depression Position Finder Type 5 Mk1 (0km away)
- World War 2, Western Australia, Rottnest Island, Coast Artillery Instrumentation, Stereoscopic Telescopes (0km away)
- World War 2, Western Australia, Rottnest Island, Coast Artillery Instrumentation, Indicator – Time of Flight Mk 1 (0km away)
- World War 2, Western Australia, Wadjemup Hill / Signal Ridge, Battery Observation Post, Layout (0km away)
- Western Australia, Rottnest Island, Signal Ridge / Wadjemup. Naval Signal Station. (0.01km away)
- Western Australia, Rottnest Island, Signal Ridge / Wadjemup. Naval Signal Station. (0.01km away)
- Western Australia, Rottnest Island, Signal Ridge / Wadjemup. Naval Signal Station. (0.04km away)
- Western Australia, Rottnest Island, Signal Ridge / Wadjemup. Naval Signal Station. (0.04km away)
- Western Australia, Rottnest Island, Signal Ridge / Wadjemup. Naval Signal Station. (0.04km away)
Nearby places: View all geotagged records »
Last modified
Sunday, 28 June, 2026
Completeness
Australian Army Museum of Western Australia
Australian Army Museum of Western Australia
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