Originally conceived as a bottom-supported drilling unit, semisubmersibles eventually found their true calling. Now, semisubs are the most stable of any floating rig, many times chosen for harsh ...

It dragged him and his fellow diver, Dave Yuasa, along with it. Lemons' cord snagged on the oil rig, stretching and snapping before Yuasa could help him. This left Lemons trapped with just a six ...