Name/Hull Nbr Class Conversion Yard/Year
USS Clamagore (SS343)
USS Cobbler (SS344)
USS Corporal (SS346)
USS Greenfish (SS351)
USS Tiru (SS416)
USS Trumpetfish (SS425)
USS Remora (SS487)
USS Volador (SS490)
USS Pickerel (SS524)
From Guppy II
From Guppy II
From Guppy II
From Guppy II
From Guppy II
From Guppy II
From Guppy II
From Guppy II
From Guppy II
Charleston - 1962
Philadelphia - 1962
Charleston - 1962
Pearl Harbor - 1961
Pearl Harbor - 1959
Charleston - 1962
Pearl Harbor - 1962
San Francisco - 1963
Pearl Harbor - 1962
A problem that became evident in the mid-1950 operations was the increasing amount of
electronic equipment that was required on a submarine. The ESM equipment, the sonar
equipment and the new fire control computer took up a lot of space. Certain boats, which already had the majority of the Guppy conversion work done (already Guppy II) and were in decent condition, were taken into the shipyard, cut in half and lengthened with a new 15 foot section. The extension was in the forward end of the control room and created a new space for sonar. (TIRU was only lengthened 12.5 feet instead of 15.) The Conning Tower was renewed with an attitional 5 foot section to accomodate the Mk 101 fire control system and Mk 37 director. The Guppy III conversion was accomplished as a part of the Fleet Rehabilitation and Modernization (FRAM) program. These four-battery, four-engine boats became Guppy III. The "Northern Sail" was also added, as it was on other classes of Guppys, in order to get the bridge higher which allowed it to be manned in severe weather. TIRU retained its three engine arrangement.
