Book excerpt: In a collision with a steamship, "City of Rome, on the night of September 25, 1925, the U.S. Navy Submarine S-51 sank in 132 feet of water, taking 33 sailors to the ocean floor. This is the story of the men charged with doing the impossible--rising the thousand ton sub from the bottom of the sea. Added to this modern classic of true adventure are a foreword and afterword giving specifics of the accident and the aftermath, additional photographs, a publisher's preface, and appendices.