This brings to mind the idea of an amphibious quadcopter. That's not what this is, but that's what I thought of. I wonder if a waterproof quadcopter would navi

This brings to mind the idea of an amphibious quadcopter. That's not what this is, but that's what I thought of. I wonder if a waterproof quadcopter would navigate well underwater. It seems like it could be an interesting environment to experiment with advanced acrobatic maneuvers at lower speeds.