RAAF A18 Short S.23 C Class "Empire Flying Boat
A-18 was also allocated to the Short S.26 Sunderland but these were not used in Australia. The Sunderlands used by 10 Squadron RAAF in the UK used the UK serial numbers.
There is only one short item and one picture in the Wills collection about these aircraft:
Crash of A18-11 in New Guinea, September 1942