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Mount Imbiah, a 1911 Map
In the list of Approved Armaments for Singapore dated August 1908, a new artillery battery, Mount Imbiah, is listed. The armament is to be a single Mark 10 9.2-Inch BL Gun on a Mark 5 Barbette Mounting, a type shown left. The Battery would seem to have become operational in 1912, appearing in the Artillery Chain of Command for Singapore for that year.
The Battery had a Mark 1 Depression Range Finder and three Position Finders, one of which is shown in the above map. Mount Imbiah assumed the role of Fire Command West, with Fort Siloso being in the Command.
The Imbiah Battery remained in service until the 1930s, when the rebuilt Fort Connaught became operational. It was then abandoned.