You've explored the possibilities of walking robots, flying robots, and sailing robots. The final frontier is robots that can actually manoeuvre under the water. It only makes sense that you use the same techniques that you've mastered to explore the undersea world. In this section, I'll detail how to use the capabilities that you have already developed in a Remote Operated Vehicle (ROV) robot. There are, of course, some interesting challenges that come with this type of project, so get ready to get wet.
As with the other projects in this chapter, there are possibilities to either buy an assembled robot or assemble one yourself. If you'd like to buy an assembled ROV, try http://openrov.com ...