Steve Neill. Here is something for your next foray into strange items to R/C as subs, it's the alien spacecraft from the original War of the Worlds movie. This thing looks pretty cool, and that creepy eye thing would make for a neat periscope above the water.
Mars aliens would love water since they didn't have much towards the end. They would have engineered their machines to operate as submerged vehicles to wipe out 1950's submarines and ships on the surface. Could have been another segment in the movie!