RAN warships were used to survey waters around Australia as part of a national hydrographic survey .
In 1946 , the Australian Cabinet decided that the RAN would remain in control of all hydrographic operations in both Australian waters and areas of Australian interest .
RAN warships were used to survey waters around Australian as part of a national hydrographic survey .
In 1946 , the Australian Cabinet decided that the RAN would remain in control of all hydrographic operations in both Australian waters and areas of Australian interest .