Use the Tiny Transformer main body as described in my Tiny Whoov build. Attach it to the Tiny Ship hull and enjoy your time on the water.
I have had a few end up at the bottom during testing and the electronics survived and continue to work. You should be able to use this with confidence. Be careful about battery drain. When you get an indication for a low battery, bring the ship back to shore.
Press the right stick up to get even more speed, but be careful as it dips the nose a little more. an FPV camera can be added to the back just like the Tiny Whoov. If you'd rather add a camera to the bow of the ship, I recommend using the v2 deeper hull. Otherwise you risk doing a dose dive into the water with the added bow weight.
The Tiny Whoop:
Furibee F36: https://amzn.to/2GOsYjh
Eachine E010: https://www.banggood.com/custlink/3mDmEaVsjr
FPV camera: https://amzn.to/2NbJk6J.
Check out more of my 3D printed designs here: https://www.thingiverse.com/drcameron/designs
Print with at least 3 walls to aid in a watertight print. Print with the top of the hull on the build plate. IMPORTANT: Test the water seal of the hull BEFORE adding electronics.