Between 1939 and 1947, Australia, with its key allies worked together on the challenging tasks of intercepting and decoding Japanese radio traffic. The work was extended to the interrogation of POWs and agents.
This document provides details of the Australian Special Wireless Group's history, locations, and staff. This group was a major part of the operations of the Central Bureau.
The intention here is to enable serious researchers into the Somerton Man case to gain an understanding of the background activities of various Government agencies throughout WW2 and up to 1947 which may or may not have a bearing on the Somerton Man case:
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https://drive.google.com/file/d/1BC5xztSVJ7tgLoS4a55ba0ZpItqdG3I/view?usp=sharing
AWM
The AWM site has numerous images and other insights into the work of the group:
https://en.wikipedia.org/wiki/Department_of_Information_(Australia)