A few years ago, I decided to get the dive gear out and start diving again.  My goal was to start diving on shallow water rocks (less than 15ft of water). I have trouble diving deeper than 12 ft since I blew a hole in my left ear drum on my last deep dive many years ago.

While trying on my wetsuit, I noticed that it had  shrank. And to add insult to injury my open water dive certification was no longer valid. All the rubber in my gear would need to be replaced.

After contemplating repairing my ear, buying a new pre-shrunk wet suit, replacing all the rubber parts and seals, getting re-certified. I decided that I could build an ROV that does not need air or get cold or the bends and can stay down 40-50 ft for hours at a time, surface as fast of the props will take it. And give me high resolution video that I can record on my laptop.

The choice was easy. I started out looking at other designs and built Nemo 1.0. While it looked good, the performance was way to slow. It was too big and under powered, so I went back to the drawing board and design a very tight, low water resistant, modular ROV,  Nemo 2.0.