OF THE ROYAL AUSTRALIAN NAVY

Indicator Loops were long lengths of cable laid on the seabed to detect enemy submarines. They were developed by the Royal Navy in the early 1900s and used in their ports both home and in the Dominions (Australia, Canada, New Zealand, Ceylon, Penang). The RAN was responsible for their installation and development in Australia from 1939 onwards. They were further developed by the United States Navy from 1940 onwards. This page documents the Royal Australian Navy's indicator loop history.
 

If you have any feedback please email me: Dr Richard Walding   Research Fellow - School of Science Griffith University Brisbane, Australia Email: waldingr49@yahoo.com.au

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