In the fall of 1903, when most of the world still thought of submarines as either science fiction or sideshow curiosities, the United States Navy quietly brought one into active service. The boat was called USS Plunger, officially Submarine Torpedo Boat Number Two. She was a stubby little creature, barely sixty-four feet long, powered by a gasoline engine that filled her insides with the stench of fumes, and armed with a single torpedo tube that, on paper at least, made her a weapon of war. On September 19, 1903, she was commissioned at New Suffolk, New York. That date puts her right at the beginning of America’s real experiment with undersea craft, and though Plunger would never fire a shot in anger, she would change the trajectory of naval warfare.
Patrol Reports 