USS Sailfish (SS-192) - Sinking of Squalus and Recommissioning

Sinking of Squalus and Recommissioning

On 12 May, following a yard overhaul, Squalus began a series of test dives off Portsmouth, New Hampshire. After successfully completing 18 dives, she went down again off the Isles of Shoals on the morning of 23 May at 42°53′N 70°37′W / 42.883°N 70.617°W / 42.883; -70.617. Failure of the main induction valve caused the flooding of the aft torpedo room, both engine rooms, and the crew's quarters, drowning 26 men immediately. Quick action by the crew prevented the other compartments from flooding. Squalus bottomed in 243 ft (74 m) of water.

Squalus was initially located by her sister ship, Sculpin. The two submarines were able to communicate using a telephone marker buoy until the cable parted. Divers from the submarine rescue ship Falcon began rescue operations under the direction of the salvage and rescue expert Lieutenant Commander Charles B. "Swede" Momsen, using the new McCann Rescue Chamber. The Senior Medical Officer for the operations was Dr. Charles Wesley Shilling. Overseen by researcher Albert R. Behnke, the divers used recently developed heliox diving schedules and successfully avoided the cognitive impairment symptoms associated with such deep dives, thereby confirming Behnke's theory of nitrogen narcosis. The divers were able to rescue all 33 surviving crew members from the sunken submarine. Four enlisted divers, Chief Machinist's Mate William Badders, Chief Boatswain's Mate Orson L. Crandall, Chief Metalsmith James H. McDonald and Chief Torpedoman John Mihalowski, earned the Medal of Honor for their work during the rescue and subsequent salvage. (The successful rescue of Squalus survivors is in marked contrast to the loss of Thetis in Liverpool Bay just a week later.)

The navy authorities felt it important to raise her as she incorporated a succession of new design features. With a thorough investigation of why she sank, more confidence could be placed in the new construction, or alteration of existing designs could be undertaken when cheapest and most efficient to do so. Furthermore, given similar previous accidents in Sturgeon and Snapper, it was necessary to determine a cause.

The salvage of Squalus was commanded by Rear Admiral Cyrus W. Cole, Commander of the Portsmouth Naval Shipyard, who supervised salvage officer Lieutenant Floyd A. Tusler from the Construction Corps. Tusler's plan was to lift the submarine in three stages to prevent it from rising too quickly, out of control, with one end up, in which case there would be a high likelihood of it sinking again. For 50 days, divers worked to pass cables underneath the submarine and attach pontoons for buoyancy. On 13 July 1939, the stern was raised successfully, but when the men attempted to free the bow from the hard blue clay, the vessel began to rise far too quickly, slipping its cables. Ascending vertically, the submarine broke the surface, and 30 feet (10 m) of the bow reached into the air for not more than ten seconds before the vessel sank once again all the way to the bottom. Momsen said of the mishap, "pontoons were smashed, hoses, cut and I might add, hearts were broken." After 20 more days of preparation, with a radically redesigned pontoon and cable arrangement, the next lift was successful, as were two further operations. Squalus was towed into Portsmouth on 13 September, and decommissioned on 15 November. A total of 628 dives had been made in rescue and salvage operations.