This U.S. Navy film shows how a sunken submarine can be raised from the depths using pontoons and air apparatus. Features footage of the salvage vessel USS Hoist (ARS-40), hard hat divers, and animations and footage of a real salvage operation exercise.
Lots of good deck seamanship involved along with some engineering math. Plus variations on the old diver's saying: "Plan your dive and dive your plan."
That saying can cover a whole range of adventures in your life - from a simple hike in the woods to creating a business.
You might notice some of the planners using a slide rule for their calculations. For some of you it might be the first time you've ever seen one in use. Hard to believe that they could perform salvage operations, build bridges and dams, design airplanes and all that stuff without a computer on hand - but they did.