The Republic of China’s Indigenous Defense Submarine, ROCS Hai Kun (SS-711) fired two MK-48 Exercise Torpedoes during her 8th underwater sea trial on 6 May 2026.
The footage and images released by CSBC Shipbuilding, cleared by the ROCN, are amazing and clearly meant for public consumption around the Pacific Rim. You can even see the trailing guidance wires and recovery by the fleet’s new rescue and salvage ship, the CSBC-built ROCS Da Wu (ARS-571), which was only commissioned last October.
The U.S. State Department approved the sale of 18 MK 48 Mod 6AT and related equipment to Taipei in 2020 for an estimated $180 million, but delivery isn’t slated until 2028, with as many as 46 ultimately planned.
Until then, the ROCN has to make do with its dwindling supply of older Indonesian license-made German-designed AEG SUT 264 torpedoes, which were received in 1998 after its initial batch of SUTs, ordered for use with its two Dutch-made modified Zwaardvis class boats in the 1980s, were used up in exercises.
Before the SUTs, Taiwan was stuck using old surplus Mk37s that it didn’t officially have.
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Warship Wednesday 8 April 2026: Front Runner
USN Photo 80-G-08937 via the National Archives.
Above we see the Cramp-built Balao (not Tench) class fleet boat USS Tusk (SS-426), some 80 years ago this week, in April 1946, just after she was commissioned. Note her late WWII style “gunboat” arrangement with two 5″/25s and two 40mm Bofors clustered around her fairwater.
Remember, National Submarine Day is on April 11th, and Tusk, which never fired a torpedo in anger (that we know of), nonetheless has one of the most epic careers in naval history
The Balao Class
A member of the 180+-ship Balao class, she was one of the most mature U.S. Navy diesel designs of the World War Two era, constructed with knowledge gained from the earlier Gato class. Unlike those of many navies of the day, U.S. subs were “fleet” boats, capable of unsupported operations in deep water far from home.
The Balao class was designed to dive deeper (400 ft. test depth) than the Gato class (300 ft.) due to the use of high-yield-strength steel in the pressure hull.
Able to range 11,000 nautical miles on their reliable diesel engines, they could undertake 75-day patrols that could span the immensity of the Pacific. Carrying 24 (often unreliable) Mk14 Torpedoes, these subs often sank anything short of a 5,000-ton Maru or warship by surfacing and using their deck guns. They also served as the firetrucks of the fleet, rescuing downed naval aviators from right under the noses of Japanese warships.
Some 311 feet long overall, they were all-welded construction to facilitate rapid building. Best yet, they could be made for the bargain price of about $7 million in 1944 dollars (just $100 million when adjusted for today’s inflation) and completed from keel laying to commissioning in about nine months.
USS Roncador (Balao) class plans
USS Roncador (Balao) class plans
An amazing 121 Balaos were completed through five yards at the same time, with the following pennant numbers completed by each:
Cramp: SS-292, 293, 295-303, 425, 426 (12 boats)
Electric Boat: 308-313, 315, 317-331, 332-352 (42)
Manitowoc on the Great Lakes: 362-368, 370, 372-378 (15)
Mare Island on the West Coast: 304, 305, 307, 411-416 (9)
Portsmouth Navy Yard: 285-288, 291, 381-410, 417-424 (43)
Our subject is the only U.S. warship named for the cusk or tusk, a large edible saltwater fish related to the cod. The 14th and last submarine to be built by the Cramp Shipbuilding Company of Philadelphia, she was laid down as the future SS-426 on 23 August 1943, and launched into the Delaware River on 8 July 1945; sponsored by Mrs. Carolyn Park Mills, wife of RADM Earle Watkins Mills (USNA 1917) who was soon to take over the Maritime Commission from the retiring VADM Emory S. Land.
Mrs. Mills christens the future Tusk, 8 July 1945. Temple University Libraries, Special Collections Research Center, George D. McDowell Philadelphia Evening Bulletin Collection, SCRC 170
Launch of Tusk, 8 July 1945. The sign on her bow says she was paid for via War Bond Purchases made by the people of Philadelphia. There were eight war loan drives from 1942 to 1945. By the end of the war, 85 million Americans had purchased 185.7 billion dollars of bonds. Temple University Libraries, Special Collections Research Center, George D. McDowell Philadelphia Evening Bulletin Collection, SCRC 170
With the end of the war, construction slowed, and Tusk was only commissioned on 11 April 1946.
Tusk had a late war “gunboat” style arraignment, including two 5″/25s and two Bofors guns, along with points for detachable 50 cals
Her first skipper was CDR Raymond A. Moore, USN, who seems to just be a placeholder as he was replaced within a fortnight by CDR Marshall Harlan Austin (USNA 1935), who had commanded the Gato-class fleet boat USS Redfin (SS-272) on her 2nd, 3rd, 4th and 5th War Patrols, sinking a Japanese destroyer and four merchantmen to earn a Navy Cross.
These images were taken the day before her commissioning:
(Cold) War!
Under Austin, Tusk completed her shakedown cruise in the South Atlantic, visiting ports in Brazil, Curacao, and Panama from June to July 1946. She returned to New London in August and the week before Thanksgiving 1946, President Harry S. Truman, ADM William D. Leahy, and Annapolis Commandant, VADM Aubrey W. Fitch, toured Tusk while she was tied up at the Naval Academy.
Photograph of President Truman and Fleet Admiral William D. Leahy inspecting the USS Tusk, a submarine, during the President’s visit to the U.S. Naval Academy. Note the well-turned-out MM1 watch stander’s dolphins and hash mark on the sleeves of his cracker jacks. National Archives Identifier: 198606
Photograph of President Truman aboard a submarine, the USS Tusk, during his visit to the U.S. Naval Academy: (left to right) the President; Vice Admiral Aubrey Fitch, Superintendent of the Naval Academy; Fleet Admiral William Leahy, Chief of Staff to the Commander in Chief; and General Harry Vaughan, Military Aide to the President. NARA 198648
Truman waves from Tusk’s conning tower. NARA 198649
The next year saw Tusk participate in a series of exercises and a minor collision with the hospital ship USS Consolation (AH-15).
Repaired in Philadelphia, she then conducted oceanographic work along the Atlantic shelf with Columbia University and the Woods Hole Oceanographic Institute
She ended 1947 at Portsmouth Naval Shipyard for a Greater Underwater Propulsion Power Program (GUPPY) II conversion, one of 24 Balao and Tench-class subs that received the SCB 47 rebuild.
During the subsequent seven months, Tusk underwent significant modifications to enhance her submerged performance. Four high-capacity 126-cell batteries replaced her original batteries, which had half as many cells, bedded into larger wells. The hull was streamlined by adding a rounded bow, recessing anchors, capstans, deck rail stanchions, and cleats; and eliminating propeller guards, improving hydrodynamic efficiency.
Topside, her deck guns were removed and sail enlarged and refined to accommodate three new masts (snorkel induction, snorkel exhaust and ESM), the snork enabling diesel-powered operation at periscope depth and battery recharging while submerged. The periscope and radar mast were enclosed. A BQR-2 sonar was fitted with hydrophones under the forefoot and its electronics housed in the forward torpedo room. Likewise, her Elliot Motor Co. high-speed drive electric motors with reduction gear were swapped out for low-speed direct drive motors of 2,500 hp per shaft, up from 1,370.
Her step-side Portsmouth Sail had a thinner top than those fitted to other GUPPYs by EB, with a curved trailing edge, square windows, and a sharper lower forward edge. They also had a fitting for the sub’s SV radar screen.
These upgrades transitioned Tusk from a submersible to an actual submarine and, while her surface speed was cut by about two knots, her submerged speed rose from 10 knots to about 15 knots.
After her G.II conversion in early 1948, she emerged looking very different from her original 1946 configuration, and, amid the Berlin Crisis, conducted a simulated war patrol to the Canal Zone in June and July as part of her post-modernization shakedown.
Her skipper during the cruise was CDR Guy F. Guggliotta, USN, another wartime sub driver who had commanded USS S-28 (SS 133), Halibut (SS 232) on her 10th War Patrol, and Raton (SS 270) on her 8th War Patrol, earning a pair of Silver Stars in the process.
Tusk, post GUPPY II conversion with her step side Portsmouth sail, seen off the New London Harbor Lighthouse.
Tusk seen between 1948 and 1962 post GUPPY II conversion with her step side Portsmouth sail, NH 67826
Cochino’s Last Dive
Attached to Submarine Development Group 2 out of Newport for the first six months of 1949, she sortied to the North Atlantic that July with SubRon 8 for a series of multinational NATO exercises that saw her visit Londonderry and Portsmouth in the British Isles.
At this point, Tusk was on her fourth skipper, WWII sub captain CDR Robert Kemble Rittenhouse Worthington, USN, who had earned a Navy Cross during Balao’s 8th, 9th, and 10th Patrols after sinking over a half-dozen small vessels, adding to a Silver Star he earned as a junior officer on four patrols aboard USS Silversides.
As noted of Cochino by DANFS, “huge waves slammed the submarines’ snorkel so violently, and jolted the boat so severely, that the pounding caused an electrical fire and battery explosion, followed by the release of deadly hydrogen [chlorine] gas,” forcing the stricken sub’s crew to evacuate the surfaced boat in terrible weather, and hunker down on her deck.
The last known photograph of USS Cochino (SS 345) was taken in July 1949. She now lies in deep water north of Norway near 71.35N. 23.35E, sunk stern first on 0146 on 26 August 1949 with no personnel aboard.
Receiving the underwater sonar signal from Cochino “Casualty surfacing,” Tusk worked over the next 14 hours on the rough seas to save first Cochino herself, then, after a second battery explosion made that impossible, to rescue Cochino’s 77 embarked souls via a prow rigged between the two boats on the open sea. Tragically, Tusk wound up trading 11 of her own crew and an embarked Philco techrep (Mr. Robert Wellington) to Poseidon in the deal, with only six later recovered from the sea alive.
A depiction of the USS Cochino battery fire that led to the sinking of the submarine in 1949, and cross-decking to Tusk, by Stanley Borack.
Greater detail from Tusk’s deck log:
Tusk, packed with nearly 150 personnel, many of them injured and suffering from exposure, she made for Hammerfest Harbor, Norway, and tied up at 0845 on the 26th to immediately receive a Norwegian medical team aboard.
Besides an officer (LCDR Richard M. Wright) sent to a Norwegian hospital in Tromso and four men flown home to Westover AFB for transfer to the Navy hospital at Chelsea, Massachusetts, the remaining 72 Cochino survivors crammed aboard Tusk once again two days later tor the return trip back across the Atlantic, arriving at New London on 9 September for a home town welcome.
Truly an epic sea story.
The 1950 Silent Service installment “The Last Dive” (Season 1, Episode 22) covered Cochino and Tusk’s final 14 hours together. A young Walter Matthau, DeForest Kelley, and Leslie Nielsen portrayed Cochino crewmembers, with LCDR Wright appearing at the end of the show, having completed 14 months of medical rehab.
Continued Cold War service
Tusk was assigned to the Submarine School at New London, then Submarine Development Group 2, interspersed with regular Atlantic Fleet exercises.
One of her declassified Dev Group tests now in the public archives is one for the Naval Research Laboratory in 1957, which involved the use of a light pulse transmitter to communicate with aircraft while submerged at depths of 90 feet.
In November 1949, during maneuvers 175nm off the Labrador coast in 40-foot seas, Tusk struck her periscope on the screw of a Navy supply ship USS Aldebaran (AF-10), picking up minor damage but suffering no casualties.
In late 1952, Tusk was assigned to SubRon 10 for a six-month Med cruise with the 6th Fleet, visiting Malta, Gibraltar, Cannes, Piraeus, Izmir, and French Oran.
USS Tusk (SS 426) post GUPPY II conversion 1 August 1952 USN 477116
Tusk would make four further European cruises over the next two decades. Notably, this would include a visit to Fiumicino during the 1960 Rome Olympics, calling in Portugal to mark the 500th anniversary of Prince Henry the Navigator, and a 1967 cruise where she would visit Bremerhaven, Aarhus, and Göteborg.
USS Tusk sailing into Malta on one of her Med deployments, pre 1965
Jane’s 1960 entry for the Tench class, with both the Cramp-built GUPPY’d Tusk and Trumpetfish listed incorrectly as members. At the time, the Navy was also operating at least 80 Balaos, including NRF ships and those in mothballs.
Tusk also pulled three shorter Operation Springboard readiness deployments to the Caribbean, a region of growing importance post-Castro. As you can imagine, annual Springboard exercises involved high-profile mock ASW, amphibious landings, and fleet maneuvers around Puerto Rico. It was a common gathering for GUPPYs in the 60s and 70s.
Balao-class Springboard GUPPYs with North Atlantic sails: USS Bang (SS-385) preparing to tie up alongside USS Chivo (SS-341) at San Juan Naval Station, Puerto Rico, during Operation Springboard. Of note, the lowest point on the keel to the IFF antenna atop the lowered snorkel was 49 feet 8.25 inches, while the height to the top of the whip antenna is 78 feet from the keel. You weren’t going to submerge one of these bad boys in 10 fathoms! Bang’s skipper, CDR R.J. Carlin, is giving orders from atop her sail. The bow of a Canadian Ojibwa (Oberon) class SSK is visible in the lower left, and a U.S. Coast Guard HU-16 Albatross amphibian is flying low in the center background. Photograph by PHC CJ Wiitala, USN, released 14 March 1968 by Tenth Naval District Public Affairs Office. NH 98697
Further, Tusk was involved in at least two extensive polar ice operations, including with USS Tench (SS-417) on ICEX ’60 and SUBICEX 1-62 with Skate (SS-578) and Entemador (SS-340).
USS Tusk, USS Entemedor, and USS Skate dusted with snow, 1962, during SUBICEX
Tusk on ICEX March 1960 with Tench
Entering Philadelphia Naval Shipyard in July 1965, Tusk was given a six-month major overhaul that including removing all her engines, motors, and generators for rebuild, receiving a new periscope with a built in electronic sextant for taking star shots while still submerged, and picking up the tall streamlined fiberglass/plastic clamshell “North Atlantic” style fairweather typically seen on most American GUPPYs after the mid-60s.
The new sail allowed extra room for the growing number of masts and aerials, a higher observation platform for lookouts, and a more habitable position for watch standers while on the surface. Tusk also received the new Prairie Masker bubbler system, increased air-conditioning capacity, additional storerooms, and additional fresh water tanks as part of the modifications.
Balao class GUPPY II sister USS Catfish post refit 1960s North Atlantic sail. Tusk had the same layout.
Balao class GUPPY II sister USS Catfish post refit 1960s North Atlantic sail. Tusk had the same layout.
Rejoining the fleet in January 1966, Tusk was transferred to SubRon 8.
Submarine Squadron Eight at New London, 1968, with a wild mix of eight Cold War fleet boat conversions. Left to right: USS Sea Robin (SS-407)(GUPPY IA with Portsmouth style step sail); Tusk (SS-426)(GUPPY II w North Atlantic sail); Sea Owl (SS-405)(Fleet Snorkel w EB style step sail and large Project Kayo BQR-4A horseshoe passive sonar array); Sablefish (SS-303)(Fleet Snorkel w North Atlantic sail); Halfbeak (SS-352)(GUPPY II w North Atlantic sail); Blenny (SS-324)(GUPPY IA w North Atlantic sail) and Becuna (SS-319)(GUPPY IA w Portsmouth step-sail). The eighth unidentified submarine on the left has PUFFS passive underwater fire control arrays for the BQG-4 system. NH 88415
Tusk (SS-426) at New London, Connecticut, June 1, 1968, as part of SubRon 8. USS Becuna (SS 319) is across the pier. Sailors on deck, civilians observe from the pier. Courtesy of D.M. McPherson, NH 86627
By 1969, Tusk had been transferred to SubRon 2 but was still based out of her traditional New London home. She was known as The Front Runner, so dubbed “due to its reputation for excellence and high-performance.”
This was supported by her being awarded the Fire Control “E” for several consecutive years and the Battle Efficiency “E” for fiscal year 1973.
Tusk underway in Hampton Roads, Virginia, 11 February 1970, as part of SubRon 2. NHHC K-81809
USS Tusk 1972 Provided by Tom Robinson QM2 (SS)
While on her fifth European deployment on 12 August 1972, while off the coast of Spain, the well-traveled Tusk made her 10,000th dive and surface, a benchmark few submarines have reached. Of note, Tusk’s Balao-class sister USS Spikefish (SS-404) had set the 10,000 record first in 1960 and earned the title of “The divingest Submarine in the World,” which was later claimed by another Balao, USS Piper (SS-409), who logged 13,724 before her decommissioning.
Speaking of decommissioning…
Under the Cog
In 1960, the ROC (Taiwan) Navy embarked on the Sea Shark Project, designed to create a submarine force.
This morphed into the Wuchang Project and, in October 1964, after months of wrangling, Capt Wang Xiling, the ROC naval attaché stationed in Rome, overcame diplomatic difficulties and ordered two 58-foot SX-404 class midget-submarines with a displacement of only 40 tons from the Italian commercial shipyard Cos.Mo.S. SpA, Livorno. Two CosMoS CE2F/X100 human torpedo chariot-style frogman SDVs were acquired as well.
ROCN 58-foot SX-404 class midget submarine Haijiao (Sea Dragon) (S-1) between 1968 and 1973
To avoid complications, the components were shipped from Europe to Tamsui and then assembled in Taiwan by CoS.MoS personnel. The two SX-404 boats were commissioned on 8 October 1969 as Haijiao (Sea Dragon) (S-1) and Hailong (Sea Dragon I) (S-2), and were immediately put to work as training vessels of the Wuchang Submarine Squadron for the nascent ROCN sub force. The CNO of the fleet, ADM Feng Qicong, personally handed out the country’s first dolphin badges that day to the program’s members.
By late 1970, and with two years of midget sub operations under the ROCN’s belt, Capt Wang Xiling, then moved to the embassy in Washington, persuaded the U.S. to sell two submarines to Taiwan as training vessels, citing the need to enhance the navy’s anti-submarine warfare capabilities. In other words, “tame mice” for the ROCN’s two dozen destroyers and frigates to play with.
On 21 April 1971, the U.S. confirmed the planned handover of two surplus GUPPY IIs, initially designated “Project Poseidon” by the Navy, and renamed “Project Mercury” in December. In March, 1972, the first batch of ROCN personnel receiving the Project Mercury submarines arrived at the U.S. Naval Submarine School in New London for training.
Tusk’s sister, USS Cutlass (SS 478), was transferred to the ROCN as ROCS Hai Shih (Sea Lion) (SS 91) on 12 April 1973, her hull number later changed to S-791
By May 1973, with Tusk just returned from a three-month Caribbean training cruise that saw her call at Guantanamo Bay, Ocho Rios, Port au Prince, and Montego Bay, she welcomed aboard 81 officers and men from the Republic of China to commence training for turnover.
In anticipation of the new (to them) vessels, Taiwan laid up its SX-404s and redesignated the Wuchang Submarine Squadron as the Republic of China Navy’s 256th Squadron (Submarine) in August 1973.
On 18 October 1973, Tusk was decommissioned at New London and was simultaneously transferred, by nominal sale, to the Taiwan Navy. Her name was struck from the Navy list on the same day.
She became ROCS Hai Pao (Seal) (SS 92) in the same ceremony, with LCDR David H. Boyd, USN, turning over the boat to CDR Cheng Kuo-Yu, ROCN. Kuo-Yu had served in the Wuchang Squadron since 1969 and had spent seven months in Sub School in New London before beginning training on Tusk/Hai Pao.
Jane’s 1975 entry on the Cutlass/Hai Shih and Tusk/Hai Pao. They have since changed their hull numbers to S-791 and S-792
Amazingly, both of Taiwan’s GUPPYs, for decades the last remaining Balaos in service, are still in operation with the 256th Squadron, training ROCN submariners for the current front-line subs, the Dutch Zwaardvis-class ROCS Hai Lung (Sea Dragon) and ROCS Hai Hu (Sea Tiger), which were delivered in 1988.
Nonetheless, they are still officially combat-ready and undergo regular dry docking, inspection, overhaul, and sea periods.
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2005
ex USS Tusk, now ROCS 海豹(seal), SS792 internals
ex USS Tusk, now ROCS 海豹(seal), SS792 Zuoying Naval Base Oct 2017 Tuo Chiang-class corvette
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2014
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2014
ex USS Tusk, now ROCS 海豹(seal), SS792 sail
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2014 Keelung
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2014 Keelung
ex USS Tusk, now ROCS 海豹(seal), SS792 circa 2014 Keelung
ex USS Tusk, now ROCS 海豹(seal), SS792 control room
ROC President Tsai Ing-wen attended the “2017 Naval Goodwill Flotilla Launch Ceremony and Submarine Indigenous Construction Design Initiation and Cooperation Memorandum Signing Ceremony,” emphasizing that submarine indigenous construction is the most challenging aspect of the national defense autonomy policy and a responsibility of the Commander-in-Chief to the nation. The ROC Navy’s Tusk/Hai Pao (SS-792) is moored to Tsai Ing-wen’s left fore-south.
When the first two domestically built Haikun (Seagull)-class SSKs arrive in service in 2026 and 2027 (?), Cutlass/Hai Shih and Tusk/Hai Pao are expected to be retired with the 40-year-old Dutch boats rotating to fill the roles of the old GUPPYs.
The President of Taiwan presides over the naming and launching ceremony of the prototype submarine built domestically, the future ROCS Haikun (SS-711), on September 28, 2023.
Epilogue
Tusk’slogs and plans are in the National Archives.
There is at least one blog and one crewmember reunion group (who last met in 2017) to cherish Tusk’s memory and those who served on her.
Her U.S. service is remembered in Cold War classic maritime art.
“Cat and Mouse” by Wayne Scarpaci shows the GUPPY II USS Tusk (SS-426) with a Lockheed (P2V) Neptune flying overhead in ASW training.
Her skipper during the Cochino rescue, CDR Worthington (USNA ’38), had been on subs that earned a dozen battle stars and sunk 100,000 tons of shipping during WWII, earning him a Navy Cross, Silver Star, and three Bronze Stars. He didn’t need more medals. He retired from the fleet as a Captain on the staff of the Twelfth Naval District in San Diego in 1962, capping a very busy 24 years of active service. Worthington received an M.S. in Physics and Electronics from UCLA and worked for Lockheed Corporation on the design and construction of the pioneering submersible Deep Quest,which achieved a depth of 8,000 feet during a test dive. Leaving Lockheed in 1975, Worthington returned to the sea, sailing as master on several ocean vessels in Caribbean and Alaskan waters. He passed away in 1996, in San Diego, leaving a wife and two children behind. His papers are in the U.S. Naval War College Archives, of which he was an alumnus.
Thanks for reading!
Meminisse est ad Vivificandum – To Remember is to Keep Alive
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Warship Wednesday, Dec. 23, 2020: All I Want for Christmas is a New SSK
Photo via the Taiwanese MNA
Here we see the beautifulTench-class diesel attack sub, ROCS Hai Shih (SS-791) of the Republic of China Navy during a celebration at Keelung Port last summer. Formerly USS Cutlass (SS-478), the Taiwanese boat is the oldest operational submarine in the world, at some 76 years young, and is set to continue to hold that title for a few more years.
Designed by the Bureau of Ships in conjunction with the Portsmouth Navy Yard and Electric Boat, the Tenches were the epitome of WWII U.S. Navy fleet boats. Some 311-feet overall, these 2,000-ton boats were an enlarged version of the preceding Balao-class. Strong, with 35-35.7# high-tensile steel pressure hull plating and eight watertight compartments in addition to the conning tower, they had a 400-foot operating depth. Their diesel-electric arrangement allowed a surfaced speed of just over 20-knots and a submerged one of 8.75 while a massive fuel capacity granted an 11,000nm range– enough to span the Pacific.
Some 80 Tenches were planned (some reports say over 120) but most– 51– were canceled in the last stages of the war when it became clear they would not be needed.
Janes’s referred to the class in 1946 somewhat curiously as the Corsair-class.
With construction spread across three yards– Boston NSY, Electric Boat and Portsmouth– the subject of our tale, the first and only U.S. Navy ship to be named after the Cutlass fish, was laid down at the latter (as were most of those that were completed) and commissioned 5 November 1944.
After shakedowns, she headed for the Pacific and left out of Pearl Harbor on her maiden war patrol on 9 August 1945 from Midway. By the night of the 14th she reached the Kurile Islands, some 1,700 miles to the West.
As described in her 17-page patrol report, by 0700 on 15 August, Cutlass received the initial news that the Japanese may be surrendering while surfaced seven miles offshore of the enemy’s coastline.
As noted by a history of Cutlass on a reunion site:
Everyone was at his station when the Chief Radioman yelled up the open hatch from the control room, ‘Sir, they are celebrating, in New York; the war is over”
Nonetheless, Cutlass was still in an active war zone and soon busied her crew with the task of sinking floating mines, a sport she spent the next two weeks pursuing. After detonating one such floating device on the 24th, her log noted, “the explosion came as a surprise because the mine was old, rusty and filled with barnacles.”
Mooring at Midway again on 27 August, Cutlass’s war was effectively over and the next month she departed the Pacific for the East Coast, hosting curious visitors for Navy Day in New York on 24 September.
USS Cutlass, likely in 1948, with only one 40mm gun mounted. USN photo # 80-G-394300 by Cdr. Edward J. Steichen
Spending most of the next two years on a spate of service around the Caribbean– tough duty– she entered Philadelphia Naval Shipyard in March 1949 for modernization.
A New Life, a New Look
She was to become a GUPPY, specifically an SCB 47 GUPPY II series conversion, ditching her topside armament, picking up a new sail, better batteries, and, most importantly, a snorkel.
Of the 48 GUPPY’d WWII diesel boats that were given a second life in the Cold War. Cutlass was one of the 14 Type II conversions
Cutlass (SS-478) port side view, circa the 1950s with stepped “Portsmouth Sail” as an early Guppy type. Photo courtesy of John Hummel, USN (Retired) via Navsource.
In her Cold War career, she spent the early 1950s at Key West, then shifted to Norfolk for the bulk of her career before returning to Florida to cap it. This included hosting President Truman on at least one occasion in March 1950.
Via NARA
Note the differences in sails. Cutlass (SS-478), Trutta (SS-421), Odax (SS-484), Tirante (SS-420), Marlin (SST-2) & Mackerel (SST-1), alongside for inspection at Key West. Wright Langley Collection. Florida Keys Public Libraries. Photo # MM00046694x
USS Cutlass (SS-478) Torpedoman’s Mate Second Class William Meisel prepares to load a torpedo in one of the submarine’s torpedo tubes, circa 1953. Photographed from inside the tube. #: 80-G-688314
Cutlass: Quartermaster Seaman Ronald Petroni and Henry Seibert at the submarine’s diving plane control, circa 1953. 80-G-688318
On 28 June 1961, Cutlass was given the task of testing Mark 16 War Shot torpedoes, by sinking the ex-USS Cassiopeia (AK-75) (Liberty Ship, Melville W. Fuller, Hull No. 504), 100nm off the Virginia Capes. She did so with a brace of four fish, earning the sub the distinction of claiming 10,000 tons on her tally sheet.
She would later receive the partial GUPPY III treatment in the early 1960s to include a tall, streamlined fiberglass sail and fire control upgrades but not the distinctive BQG-4 PUFFS passive ranging sonar. This much-changed her profile for the third time in as many decades.
USS Cutlass (SS-478), early 1960s NH 82299
Cutlass photographed 9 May 1962, while operating with USS LAKE CHAMPLAIN (CVS-29). USN 1107442
Cutlass (SS-478) at Genoa Italy, 29 June 1968. Note the windows in the sail. Photo courtesy of Carlo Martinelli via Navsource
USS Cutlass (SS-478) photographed circa 1970. NH 82301
Busy throughout the 1950s and 60s, she would hold the line during the Cuban Missile Crisis and deploy to the 6th Fleet on Med cruises at least four times, one of which she would extend by a tour around the Indian Ocean, operating with the Pakistani Navy– a fleet that would go on to use a few of her sisters (losing PNS/M Ghazi, ex-USS Diablo in the Bay of Bengal in 1971).
She ended her career as part of the rusty and crusty GUPPYs of SUBRON12 in Key West, tasked primarily with being a target vessel for destroyers, aircraft, and SSNs to test out their sonar and fire control on, often making daily trips out to the Florida Straits to be the “fox” for the hounds.
An anecdote from that time:
While on these operations, CUTLASS was a target for destroyers going through Refresher Training. During the week CUTLASS would outwit the destroyers by firing beer cans from the signal gun, so as to give the destroyers a false target for their Sonar while the CUTLASS evaded them. Then on Saturday CUTLASS went out to get “Sunk” so as to allow the destroyers to pass their exercise.
On her last Med Cruise in early 1972, she was able to get close enough to the USS Franklin D. Roosevelt to fire a signal flare within torpedo distance of her in an exercise, to the reported dismay of FDR’s destroyer screen. It wasn’t just American carriers the 28-year-old diesel boat counted coup upon that cruise, she also came close enough to the Soviet Moskva-class helicopter carrier Leningrad to get a snapshot.
Nonetheless, she was not long for the U.S. Navy.
Another New Life
Finally, as SUBRON12 was disbanded and the last GUPPYs were liquidated in the early 1970s, many were gifted to U.S. allies overseas. With that, Cutlass was refurbished, her torpedo tubes sealed, then was decommissioned, struck from the Naval Register, and transferred to Taiwan under terms of the Security Assistance Program, 12 April 1973.
There, she was renamed Hai Shih (Sea Lion) (SS-1) and was intended to serve as an ASW training platform, essentially an OPFOR for Taiwan’s destroyer and S-2 fleet.
1973 entry in Jane’s, noting that Cutlass and Balao-class near-sister USS Tusk (SS-426), were the country’s first submarines.
As a matter of course, the long-held belief is that the Taiwanese soon got both Cutlass and Tusk’s combat suite up and running with a combination of assistance from freelance Italian experts and West German torpedoes.
While the GUPPY combat record in 1982 wasn’t impressive, it should be noted that even old SSKs can prove extremely deadly in a point defense role of an isolated island chain when operating on home territory. They can basically rest with almost everything but their passive sonar off and wait for an enemy invasion force to get within torpedo range. After all, there are only 13 beaches that are believed suitable for an amphibious landing in Taiwan.
She recently underwent extensive refurbishments of her hull, electronics, and navigational systems to allow her to continue operations for another six years.
Those tubes sure look well-maintained for being sealed dead weight.
Check out the below video of Cutlass/Hai Shih in action (go to the 2:58 mark).
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