bonajet, the Lend Lease Catalina wrecks are off the West Coast of Rottnest, and probably too deep to dive on. There has been some study done by the W.A. Museum as regards recovery of a Black Cat wreck, but it has all come to naught.
They were blown up, a couple burnt as well - there's a large amount of info about them in the following document.
https://www.google.com.au/url?sa=t&r...45645796,d.aGc