Volume - ExBirdy is correct. A full list of all RAN aircraft purchased during the aircraft carrier period (approx. 394) is contained within the book 'Wings Across the Sea' by Ross Gillett published in 1988. It shows clearly that there were two 845 aircraft, one, an S2E (N12-153600) written off due fire damage 4/12/76 and one, an S2G (N12-152334) purchased with many other replacement acft in 1977
The aircraft carrier period operation included the following ships: HMAS SYDNEY, HMAS VENGEANCE and HMAS MELBOURNE. Unbeknown to me until I read the book, the RAN operated 14 Spitfires (purchased from RAAF in 1948) as a training aid for ground crews on a laid out 'dummy aircraft carrier deck' at NAS NOWRA. They were sold in the 1950's. Serial No.s for these aircraft and 20 or so other types with serial no.s, purchased and disposal dates/who supplied and where disposed are contained within this book.