Sounds like my water for the Volga dio in the Russina front GB.\ said:Its for my LCVP in open water, i've built the base approx 2" deep, i painted this dark greens and greys. I then placed a clear perspex sheet in and cut out a slot for the craft to sit in, i was starting to add resin on top of this and aimed to put in around 15 -20 mm then use clear silicon to show the effect of breaking water around the boat, still aim on doing this but may have to paint the first coat of resin and start again.
A Couple of tips. I used Vallejo Still water resin. And yes its very clear! On the plus side it can be tinted to any colour with a few drops of their paint. I used Khaki and sand for a nice muddy river water. I would thing a blue grey will be more your cup of tea (yummy). Be sure that the boat fits well in the hole and I would advise you to seal it in with plastercine so there are NO leaks. My first bottle ot the resin drained away over night!. Also I would recomend that you dont do it in the shed. It will take forever to cure and you will risk fogging and even worse, lifting.
Vallejo also make the clear water paste, which is a bit like very thick pva but isnt. You could maybe use this to seal the hull in the perspex with. Once that has dried, pour the resin in and leave to dry. If you want onlt light ripples on the water, this can be acheived my runnung your fingers across the resin before it is dry. You could use the paste again to build up waves. The paste can also be coloured to match the water. Once that is dry you can try either a thick white paint to do a bit of scum around the boat, or use the foam from Vallejo. ( No I do not have shares in them, I just like them).
Here are the products: Water & Stones