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Sheppard James Shreaves (July 1885–January 1968) was a Dockmaster and foreman shipwright for the Panama Canal Mechanical Division, as well as a qualified diver and supervisor of the Panama Canal’s salvage and diving crew. At age 38, Sheppard Shreaves was awarded the Gold Lifesaving Medal for his heroic efforts in raising of the sunken submarine with two men trapped in the engineroom. Working against time, Shreaves enabled the rescue of Lawrence Brown and Henry Breault from the bottomed submarine. His being underwater and in his diving suit for almost 24 hours set a new record for the longest duration dives up to that time.〔Grigore (May 1969) pp. 16-18.〕 With more than 1,000 dives behind him, Shreaves retired to St. Petersburg, Florida on December 31, 1945, after 32 years of Panama Canal service. He died in January 1968.〔 ==Recovery of the O-5== On 28 October 1923, the was operating with other units of the U.S. Atlantic Fleet under the command of Commander Submarine Force, Coco Solo, Canal Zone. At approximately 0630, , under the command of Lieutenant Harrison Avery, was underway across Limon Bay toward the entrance to the Panama Canal. The steamship SS ''Abangarez'', owned by the United Fruit Company and captained by Master W.A. Card, was underway toward Dock No. 6 at Cristobal. Through a series of maneuvering errors and miscommunication, the SS ''Abangarez'' collided with the and struck the submarine on the starboard side of the control room, opening a hole some ten feet long and penetrating the number one main ballast tank. The submarine rolled sharply to port – then back to starboard – and sank bow first in 42 feet of water.〔Christley〕 Salvage efforts began immediately, and divers were sent down from a salvage tug that arrived from Coco Solo. By 10:00am, they were on the bottom examining the wreck. To search for trapped personnel, they hammered on the hull near the aft end of the ship and worked forward. Upon reaching the torpedo room, they heard answering hammer blows from inside the boat. In 1923 the only way the salvage crew could get the men out of the submarine was to lift it physically from the mud using cranes or pontoons. One of the largest crane barges in the world, ''Ajax'', built specifically for handling the gates of the canal locks, was in the Canal Zone. However, there had been a landslide at the famous Gaillard Cut and ''Ajax'' was on the other side of the slide, assisting in clearing the Canal. The excavation shifted into high gear and by 2:00pm on the afternoon of the sinking, the crane barge ''Ajax'' squeezed through and was on its way to the site.〔 Divers worked to tunnel under the ’s bow so lifting cables could be attached. ''Ajax'' arrived about midnight, and by early morning, the cable tunnel had been dug, the cable run, and a lift was attempted. Sheppard J. Shreaves, supervisor of the Panama Canal’s salvage crew and himself a qualified diver, had been working continuously throughout the night to dig the tunnel, snake the cable under the submarine, and hook it to ''Ajax’s'' hoist. Now the lift began. As the crane took a strain, the lift cables broke. Shreaves and his crew worked another cable set under the bow and again ''Ajax'' pulled. Again, the cable broke. All through the day, the men worked. Shreaves had been in his diving suit nearly 24 hours. As midnight on the 29th approached, the crane was ready for another lift, this time with buoyancy being added by blowing water out of the flooded Engine Room. Then, just after midnight, the bow of broke the surface. Men from the salvage force quickly opened the torpedo room hatch, and Breault and Brown emerged into the fresh air.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sheppard J. Shreaves」の詳細全文を読む スポンサード リンク
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