Nice work, empty_fox, I guess that probably has to be it. Looking at this pic:

http://www.pbase.com/bmcmorrow/image/45156435

and a couple more around it, it seems that the wreck was about two-thirds engulfed between running aground in 1976 and the above pictures in 2005. From this I deduce two things. Firstly, the GE images must be very recent if the wreck has all but vanished, and secondly there must have been a storm of rather severe scale to bury the remaining third in so short a time.

I'm still a little mystified, but your diligent work has moved things on considerably