SINKING OF USS SQUALUS OFF NEW HAMPSHIRE

Sinking of USS Squalus off New Hampshire

The technological face of United States naval power carried its own risks, even in peacetime. On May 23rd, 1939, the submarine USS Squalus submerged for a test dive off the New Hampshire coast and suffered a catastrophic failure in one of its main air and water systems. Seawater flooded aft compartments, sending the boat to the bottom in cold, dark water with part of the crew trapped inside. Above the surface, rescue and salvage teams mobilized quickly, using a newly developed diving bell that could be lowered to mate with the submarine’s escape hatch. Over a series of tense operations, divers and rescuers brought surviving sailors to safety while working in dangerous conditions themselves. Although not everyone on board lived, the Squalus rescue became a landmark in undersea survival and recovery. The lessons learned shaped procedures, equipment, and training that would later influence wartime submarine operations and offered proof that innovation in rescue technology could save lives as surely as new weapons could take them.