National Archives of Australia recently scanned newly released documents relating to mining ops during 1944, code named ‘Operation Granny’,
carried out by RAAF 11, 20 & 43 Catalina Sqdns..
Copied excerpts follow here, but all 94 pages can be seen/downloaded from –
(Copy & paste link in your web browser).
RAAF Catalina Manilla mining 1944