USS Dace (SS-247)

USS "Dace" (SS-247), a "Gato" class submarine, was the first submarine of the United States Navy to be named for any of several small North American fresh-water fishes of the carp family. She was launched on 25 April 1943 by Electric Boat Company of Groton, Connecticut sponsored by Mrs O. P. Robertson, and commissioned on 23 July 1943 with Lieutenant Commander J.F. Enright in command.

Departing New London, Connecticut, on 7 September 1943, "Dace" arrived at Pearl Harbor on 3 October, and 17 days later sailed on her first war patrol, bound for the southeast coast of Honshū and the approaches to Nagoya. On 7 November she made her first contact with the enemy, severely damaging a freighter with torpedo hits. Alert action by patrol craft prevented "Dace" from continuing her attack. She returned to Midway to refit between 11 December and 7 January 1944.

On her second war patrol, "Dace" cruised the shipping lanes south of Truk. On the night of 26 January 1944, she contacted a large tanker, closely guarded by two escorts. She fired a spread of torpedoes, heard five explosions, and broke off the contact to avoid the pursuit of the escort. The cause of the explosion remains unknown since Japanese records show no ship damaged in that area on that date. After fueling at Tulagi on 2 February and 3 February, she continued her patrol close to Truk during raids there on 16 February and 17 February by carrier aircraft. On 25 February she arrived at Milne Bay, New Guinea, to refit. She put to sea on her third war patrol 18 March, and two days later embarked a group of commandos at Langemak Bay. For the next week she scouted the coast around Hollandia (currently known as Jayapura), New Guinea, landing the commando parties and taking them back on board at night. She refueled at Manus on 27 March and 28 March, and sailed on for her assigned patrol area. This patrol was interrupted from 10 April to 16 April, when "Dace" made rendezvous at sea with badly damaged sister ship USS|Scamp|SS-277 and escorted her into Manus. On 13 May "Dace" put into Brisbane, Australia, to refit.

"Dace's" fourth war patrol, between 13 June 1944 and 12 August 1944, found her fueling at Manus on 20 June and 21 June, and sailing on to patrol the Mindanao coast in Davao Gulf. Many contacts were made, but most were too small to provide worthwhile targets. On 9 July she scored at least three hits on a large transport whose two escorts dropped a total of 43 depth charges, shaking the submarine up badly but causing little damage. A daring reconnaissance mission took her into Sarangani Bay on 16 July, and ten days later, she began an epic chase. She pursued a smoke contact visible on the horizon for a full day, eight times being forced down to avoid detection by patrolling aircraft. That night after dark, she reestablished contact, and just after midnight on 27 July, "Dace" launched her attack firing ten torpedoes into a convoy of three merchantmen guarded by six escorts. She sent a tanker to the bottom, then was forced deep as one of the escorts tried to ram her, and began its depth charge attack. On 31 July she sank another ship, this a small freighter, and the next day received another depth charging after an attack on a well escorted freighter. With all torpedoes gone, "Dace" put in to Manus on 6 August, and sailed on to Brisbane, arriving 12 August.

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"Dace" cleared Fremantle on 2 December 1944 on her sixth war patrol. She scouted along the Singapore-Hong Kong shipping lane, then sailed on to mine the channel between Palau Gambir and the mainland. Finishing her task 16 December, "Dace" heard loud explosions from the mined area late in the afternoon, indication of a job well done. Three days later, while preparing to attack an eight-ship convoy, "Dace" was violently shaken by four depth charges or bombs. She went deep, hitting bottom, and while waiting there for the escorts to break off their attack, was bumped, turned, scraped, and clanked along the bottom by the strong current. Somehow the enemy did not detect her for all this noise, and she was able to surface later, repair minor damage, and sail on to patrol farther north. On 28 December she sank "Nozaki", a naval auxiliary, and damaged a freighter in the same convoy. She put in to Saipan for fuel on 17 January 1945, and reached Pearl Harbor on 28 January.

After a west coast overhaul, "Dace" sailed from Pearl Harbor on 25 May 1945 on her seventh war patrol. She fueled at Midway on 29 May, and entered her patrol area in the Kurile Islands on 7 June. Here she sank two sailing ships by gunfire, then headed into the Sea of Okhotsk. On 10 June she detected a large freighter and a small tanker sailing through the fog. Making her run into attacking position, she saw the convoy also included three escorts, but continued to close the freighter, firing her first spread at only convert|380|yd|m|-1. She swung to fire at the tanker as the freighter exploded and sank, then was confronted by an escort apparently planning to ram. "Dace" fired a torpedo "down the throat" of the escort, and plunged deep. A severe depth charging followed, after which "Dace" fired again at the escort. She returned to Midway on 25 July, and sailed on to Saipan on 13 August, preparing for her eighth war patrol.

With the end of hostilities, "Dace" was ordered back to Pearl Harbor, and on 5 October 1945 arrived at New London. She was placed in commission in reserve at Portsmouth Naval Shipyard on 15 January 1946, and was towed to New London, where she was placed out of commission in reserve on 12 February 1947.

Recommissioned on 8 August 1951, "Dace" operated from New London along the Atlantic coast and in the Caribbean Sea until placed in commission in reserve at New London on 31 December 1953. She was placed out of commission in reserve at Portsmouth Naval Shipyard on 15 January 1954 for extensive modernization, then was recommissioned 22 October 1954. After training men of the Italian Navy, she was decommissioned at New London 31 January 1955, and transferred to Italy under the Military Assistance Program the same day.

In addition to the Navy Unit Commendation, "Dace" received seven battle stars earned during her seven war patrols, the last five of which were designated as "successful." She is credited with having sunk 28,689 tons of Japanese shipping.

Ex-"Dace" was commissioned in the "Marina Militare Italiana" (Italian Navy) as "Leonardo da Vinci" (S-510). She was originally to be lent to Italy for five years, but this arrangement was extended five more years in 1959 and extended another five yet again, twice. Together with sister ship "Enrico Tazzoli" (S-511), ex-"Barb" (SS-220), she formed the backbone of Italian submarine strength in the late 1950s and 1960s. SS-247 was stricken from the US Naval Vessel Register on 15 October 1972; "Leonardo da Vinci" was deleted from the Italian Navy the following year.

:(Jane’s Fighting Ships, in the 1954-55 and 1955-56 editions, state "Dace" became "Enrico Tazzoli" and "Barb" became "Leonardo da Vinci". Several other sources and all later editions of Jane's agree that it was the other way around).

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