Thinking specifically of scuba diving. It requires a ton of equipment and training and can still be dangerous. In movies there’s always some kind of little gadget that allows people to breathe underwater without all that equipment. Why can’t we build a simple mouth piece with an oxygen canister attached that we could carry around and breathe into when we need?
In: Engineering
Movies use the little gadget because it looks cool on screen, not because there’s actually a good way to squeeze scuba technology into a pocket-sized device.
You need a fairly large yet strong container to store enough pressurized gas to do anything useful underwater. You can’t use straight oxygen either because it damages your lungs at high pressure. You need a monitoring system and control valves because running low while underwater can turn lethal very quickly.
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