Drag, Weight , Size (Score 3, Insightful)

One thing that everyone keeps forgetting is drag / weight / size. The type of equipment that this guy is talking about is going to take up a lot of space. Usually things that take up space weight something. Things that also take up space require energy to move them through the air. His only form of propulsion is gliding / compressed air, but gliders are usually extremely aerodynamic vehicles with a high glide ratio. Drag and the weight of the aircraft are directly related to such a ratio. So in theory, the super marine would go up, glide a foot, and then have to repeat. Not to mention maneuverability. Highly impractical.