Photo emailed to me by boatie mate at Hammo:
Looks like broken Rear Back/Row 2 window to me.
(Would have attached photo but don't know how to from desktop).
Apparently the aircraft was under water N/W of Dent Island, then towed to a beach by the floating chute. During the attempt to relocate to Shute Harbour, it got away and sank in 15-20 m of water.
