Hi
thanks for your comments.
I live in england, so do not get many chances to dive nowadays locally. But in the summers I will dive on the south west coast where visibility is okay.
I created the water using layers of cling film stuck together with PVA glue, and painted every other layer blue, then attached around 6 of these double layers together.
I then used coat hangers to extend it and so allow the boats to sit on the surface.
Thanks Adrian