Google maps mystery

[Blakduk]

Guys, I was just looking at GoogleEarth exploring kayaking sites when I stumbled across an image of a plane that I cannot identify.
Have a look at the image of the Pambula river just south of Pambula Beach, Southern NSW, Australia. The plane is a twin engine ?? At very low level on the north river bank halfway between the lake and the estuary (about 2km).
Any ideas what it might be and what it might be doing?