BB, I know how little I know about Poser- I stand on the shoulders of giants. I have been waiting for someone to tell me I'm re-inventing the wheel and post a link to a better material. I have gone back and de-cluttered the nodes to take into account of your advice. It took me a while to work out the water prop shouldn't cast a shadow. I'm still not happy with the absorption volume and I might try combining waves and clouds.

Poser 11 , 180Gb in 8 Runtimes, PaintShop Pro 9
Windows 7 64 bit, Avast AV, Comodo Firewall
Intel Q9550 Quad Core cpu,  16Gb RAM, 250Gb + 250Gb +160Gb HD, GeForce GTX 1060