The mechanical Hedgehog proved itself to be a deadly predator and killer of Axis submarines. When one thinks of antisubmarine ...

In 1895, the American John Philip Holland created a submarine with mixed propulsion powered by gasoline and electric engines.

The U.S. Navy ran depth-charge tests against an operational submarine that, for most of the test, was moored underwater without a crew. Finding that 300 pounds of TNT was not very effective ...

I forget how many depth charges were dropped, 40 or 50. I remember saying to myself: “This is hell, and I am not going to stay in submarines any more. I just can’t take it.” I looked around.

2. A submarine and its machinery must be able to continue operation after enemy depth charges have exploded just outside the hull. Mark I was built to the high mechanical shock standards which res ...

Higher carbon-dioxide levels in the atmosphere change all these things. The gas’s mere presence acidifies seawater. Its ...

The Navy ordered the manufacture of its own PV-1 Venturas, which had a range of 1,360 miles and could carry 3,000 pounds of bombs or anti-submarine depth charges. The PV-1 bomber, which also bore ...

Using a diesel engine to charge a large bank ... the water at only 3.5 mph to a depth of just 330 feet. This is a much more common speed for a personal submarine, as they're not typically designed ...