A new Florida company is testing a combination of a fast cruising boat and submarine called the Hyper-Sub that it says goes 35 mph on the surface, 6 mph when submerged, and can dive down to 1,200 feet. Created by HSP Technologies of Lake City, Florida, the prototype was tested this summer and the company is now conducting further sea trials. The Hyper-Sub is 45 feet long with a 16-foot beam and uses two 480-hp Yanmar diesels for surface power. Underwater, it’s powered by two 60-hp 12-inch innerspace thrusters. The boat/sub carries 525 gallons of fuel, and burns 34 gph…