The Navy celebrated the 63rd birthday of its oldest vessel -- the Guppy-class SS-791 Sea Lion submarine -- last Thursday.
The SS-791 was not only celebrating its 63rd birthday, but also its 34th year of service in the Navy. Along with the SS-792 Seal, the SS-791 is one of two existing "miracles" in the navy, as it is the oldest submarine still in service.
As part of the Mutual Defense Treaty between the US and the Republic of China (台美協防條約), in 1970 the US gave the SS-791 and SS-792 to the Taiwanese Navy -- after serving 28 years in the US Navy.
PHOTO: CNA
In 1973, Captain Kuan Chen-ching (
During the ceremony last Thursday, Rear Admiral Wang Hsi-ling (汪希苓), Taiwan's military attache to the US who oversaw the arrangement in the 1970s, officially accepted the two vessels on behalf of Taiwan.
With old piping, big knobs and rudders, old panels, limited space and the pervasive oil smell, the interior of the submarine is strikingly reminiscent of scenes from World War II movies. Sonars and torpedo systems complete the experience.
Among the 75 sailors on board, only the captain enjoys a private room -- and it is smaller than one ping. Everybody else, including the first officer, shares a public room for sleep. Regular meals are provided by a kitchen approximately two pings in size. It takes more than an hour for everybody on board to finish their meal as only 20 people can fit in the dining room at any given time.
With its 5,200 horsepower diesel engine, the SS-791 was initially capable of completing a non-stop 8,350km trip in approximately 45 days. Top speed under water was 12 knots and 16 knots on the surface.
A rumor that could have proven harmful to the navy's image and affect sailors' morale haunted the vessel since its acquisition, however. Some believed there was a real chance that after diving, the two Guppy-class subs would never resurface.
But SS-791 Warrant Officer Liu Tsai-hsin (劉財心) explained why the rumor never turned into reality.
"There is an air tank inside the vessel. When the submarine is on the surface, its entire weight is approximately 1,800 tonnes. When we need to dive, however, the air tank will take in 3,000 pounds [1,360kg] of air, turning the vessel into a 2,400-tonne rock. The system may be old, but it is reliable," Liu said.
Between 1944 and 1946, the US built 45 Tench-class submarines. Fourteen of those were upgraded to Guppy-class in 1950, including the SS-791.
Prior to joining the Taiwanese fleet, the SS-791 was known as the USS-478 Cutlass. It was built in the Portsmouth Naval Shipyard in Kittery, Main, and completed on Nov. 5, 1944.
The vessel was initially equipped with 10 torpedo launch tubes and sonar systems, with 11 officers and 70 petty officers and sailors.
But the US government's plan to help Taiwan's destroyer fleet conduct anti-submarine warfare resulted in the removal of all torpedo systems from the sub before it was handed over.
After it came into service, the Navy tried to restore its torpedo capability, but its indigenous system never reached optimal operability and the SS-791 was eventually allocated for training purposes.
The Navy's Fleet 256 chief of staff Rear Admiral Yang Yi (楊木益) believes the SS-791 can still make a contribution to the training of the Navy's next generation of officers.
"It is a tough environment for future naval officers to grow in. It is small, old and slow," Yang said. "But, the vessel itself is truly a legend."
Although it is the oldest submarine in service, many contemporary high-ranking naval officers have served on board the SS-791, including Minister of National Defense Lee Jye (李傑), Deputy General-Chief-of-Staff Admiral Wang Li-shen (王立申) and Deputy Commander-in-Chief of the Navy Lieutenant General Shen Po-chi (申伯之).
Lee was a lieutenant commander when the SS-791 was given to Taiwan and was also the first weapons chief on board the Sea Lion. He later became the third captain of the SS-791.
After new submarines are acquired by the Navy, the Ministry of National Defense will retire the SS-791 and the SS-792. Navy enthusiasts expect the two vessels will be restored after they retire and hope one will be used for training purposes at the Naval Academy while the other will be ported and turned into a museum.
Eight Chinese naval vessels and 24 military aircraft were detected crossing the median line of the Taiwan Strait between 6am yesterday and 6am today, the Ministry of National Defense said this morning. The aircraft entered Taiwan’s northern, central, southwestern and eastern air defense identification zones, the ministry said. The armed forces responded with mission aircraft, naval vessels and shore-based missile systems to closely monitor the situation, it added. Eight naval vessels, one official ship and 36 aircraft sorties were spotted in total, the ministry said.
INCREASED CAPACITY: The flights on Mondays, Wednesdays, Fridays and Sundays would leave Singapore in the morning and Taipei in the afternoon Singapore Airlines is adding four supplementary flights to Taipei per week until May to meet increased tourist and business travel demand, the carrier said on Friday. The addition would raise the number of weekly flights it operates to Taipei to 18, Singapore Airlines Taiwan general manager Timothy Ouyang (歐陽漢源) said. The airline has recorded a steady rise in tourist and business travel to and from Taipei, and aims to provide more flexible travel arrangements for passengers, said Ouyang, who assumed the post in July last year. From now until Saturday next week, four additional flights would depart from Singapore on Monday, Wednesday, Friday
The Ministry of National Defense yesterday reported the return of large-scale Chinese air force activities after their unexplained absence for more than two weeks, which had prompted speculation regarding Beijing’s motives. China usually sends fighter jets, drones and other military aircraft around the nation on a daily basis. Interruptions to such routine are generally caused by bad weather. The Ministry of National Defense said it had detected 26 Chinese military aircraft in the Taiwan Strait over the previous 24 hours. It last reported that many aircraft on Feb. 25, when it spotted 30 aircraft, saying Beijing was carrying out another “joint combat
Taiwan successfully defended its women’s 540 kilogram title and won its first-ever men’s 640 kg title at the 2026 World Indoor Tug of War Championships in Taipei yesterday. In the women’s event, Taiwan’s eight-person squad reached the final following a round-robin preliminary round and semifinals featuring teams from Ukraine, Japan, Thailand, Vietnam, the Basque Country and South Korea. In the finals, they swept the Basque team 2-0, giving the team composed mainly of National Taiwan Normal University students and graduates its second championship in a row, and its fourth in five years. Team captain
RSS