How the sub works
What problem does it solve?
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It solves the problem of sending people down under the water with the chances of getting hurt or even killed if for the sub broke or ran out of air. It is also much cheaper than a human sized sub, and easier to transport and store.
How will it affect society?
This product will affect society because the target audience, scientists and universities, will want to buy my product and they will make new discoveries about the ocean. Also, people will start buying my cheaper, smaller subs instead of the big expensive ones. The military could also use them for spying.