Chris Lemons was a saturation diver for 10 years working on oil fields on the North Sea floor. Now, Lemons is a supervisor, who gives instructions to divers and is responsible for keeping them alive.

Add Yahoo as a preferred source to see more of our stories on Google. Lead image: (Deep-sea diver welding underwater. Credit: SvedOliver / Shutterstock.) Chris Lemons, a saturation diver from England, ...