Goooo Taiwan! Congrats on your first locally-built submarine! Cheers from New Zealand!

As mentioned, in the 80's Taiwan bought 2 Zwaardvis-class submarines from the Netherlands. When Taiwan wanted a follow up purchase of 2 more Dutch submarines, the Netherlands (under heavy pressure from the PRC) sadly refused. However the Dutch government has always been closely intertwined with that of Taiwan in many ways, and although they couldn't be seen exporting finished submarines to Taiwan, it's very likely they okey'd the Dutch naval industry to send Taiwan the blueprints of the Zwaardvis-class and maybe even newer technical data such as part or all of the Walrus-class.

They did rush this first version of the Hai-Kun. The first was supposed to be delivered in 2025, but they decided to speed the production of this first one. I hope it proves to be a good platform for them to test out what they had built, and to improve on building techniques and systems integration for the other 7 subs they plan to make.

I think it’s a good start, and arguably the logical path for Taiwan. Once you’ve got the basics worked out, adding either AIP or lithium batteries, anechoic tiles etc is the next step. The same with the weapons options, developing advanced sub launched weapons, when your sub fleet is so limited, is a lower priority. Arguably adding a cruise missile capability would be more important than adding anti-ship missiles in the near term.

非常感謝各國專家協助完成潛艦的建造，台灣會繼續堅持民主自由人權，在西太平洋維護世界和平。 Very thanks to all countries which support and help the submarine, Taiwan will stand for democracy, freedom, human right in west Pacific, keeping world peace.

As a fabricator and pipe welder, I have known a few guys over the years that had worked in the shipyard that built subs. They spoke of the complexity of a sub. They did a pretty good job in a short time. Better than nothing, I guess 😉

Your channel has gained some attention lately. Congratulations. Youre doing great work.

Outside the facetted outer hull, the Taiwanese boat seems perfect for their needs. They don't need the extended range for local defence, but some improved anti-detection (like anechoic coatings etc) would be useful.

Thanks for covering smaller subjects like this, it's fascinating to see these smaller navies like this

Taiwan's first nearly 3,000-ton self-made submarine "Narwhal" has just been built and is undergoing testing. Taiwan's first AI unmanned attack submarine "Huilong" will also be launched by the end of this year. While Taiwan is building manned submarines, it is also secretly using submarine development technology to produce unmanned submarines. The self-made "Huilong" (meaning: Intelligent Dragon) unmanned submarine is a smaller version of the submarine, with specifications of 30 meters long, 6 meters high and 3.6 meters wide. It adopts a double-shell design (the length of the inner pressure shell is 20 meters). Its height including the sail cover is 6 meters, and the outer shell is also coated with black sound-absorbing coating. In addition, the internal settings are not only equipped with cruise, sonar detection and other systems, but more importantly, it also adds a life support system (for special forces missions) and a system equipped with two torpedo launch tubes. This is almost the basic configuration of a 100-ton small submarine. It uses a hull similar to a manned submarine with a sail-type structure design, and is also equipped with two torpedo launch tubes. The "Huilong" unmanned submarine can launch small unmanned AI boats, torpedoes, mines and underwater loitering munitions to monitor, lock on and loiter attacks on enemy targets. The hull of the "Huilong" unmanned submarine is made of alloy steel produced by Taiwan Steel and can withstand seawater pressure of 1,000 meters. It allows the "Huilong" unmanned submarine to stay at a depth of nearly 900 meters underwater. Not only will it not be detected, but it will also be unable to be attacked by mines or torpedoes. The "Huilong" unmanned submarine can perform combat missions alone, or it can accompany the submarine as a wing boat for coordinated operations. Taiwanese civilian manufacturer has developed an Autonomous Underwater Vehicle (AUV) for the Navy - the Seawolf 400 AUV system. The Seawolf 400 AUV is 4 meters long, weighs about 1,000 kilograms, has a speed of 2 to 7 knots, can submerge for 8 to 10 hours, and can carry AI reconnaissance equipment and attack weapons. Taiwan's Navy has partnered with an innovative company to develop an underwater glider. This equipment has the characteristics of long-term operation, large-scale collection of underwater information, high concealment, low maintenance and operation costs, fast maneuverability, and diversified underwater reconnaissance. It can collect hydrographic information for the Navy and influence the selection of sonar modes and the application of tactics. In addition, the equipment also has stealth characteristics and can perform underwater missions for more than one month, improving the Navy's ability to deal with underwater operations and intelligence collection. Several underwater gliders are currently being deployed to perform missions. Taiwan plans to produce eight Submarines, 46 AI Unmanned Submarines, hundreds of Seawolf 400 AUVs, and a fleet of Underwater Gliders. Based on this, the Taiwan Navy has been able to build a powerful, modern underwater fleet with AI networked combat capabilities.

According to Taiwanese media reports, Hai Kun doesn't have sub-launched AShM yet. Maybe it will have that or more capabilities until the expected delivery time by the end of next year. Above all, this boat is both the first domestically developed sub and meant to serve as the prototype for follow-on boats.

U.S wants Taiwan and Japan to join in the joint sea exercises. Taiwans gonna need some boats.

Yay! Was only thinking yesterday how I was hoping you'd publish again soon. Thanks mate!

I remember that the Netherlands also has a rich history regarding submarines in relation to Taiwan. Back in the early eighties, the Taiwanese government ordered two modified Zwaardvis-class submarines, these were also delivered. In 1993 a repeat order for the same submarine class was canceled due to political pressure from the Chinese mainland. I recall that there was a similar event in regard to the more modern Walrus-class submarine sometime later. And I even remember something about a custom-built submarine. In my memory, every 10 years or so this topic tends to come up in my country. But since the nineties, the economic ties to the Chinese mainland have been deemed too important to antagonize Beijing.

4:00 ..if you've been around commercial and naval ships much you'll know that superficial sheet metal like this is often shows a lot of "oil canning". It's not a problem because it's really just there reduce resistance to motion, to create a space for the ballast tanks (which are open to the sea on the bottom) and the barest modicum of protection for masts, valves, air inlets, and when surfaced, the lookouts and navigation team.

If these subs are able to threaten China's amphibious LHA and LHD ships then they've probably saved their island.

They are showing that they can do it themselves, which is a deterrent tactic and also shows that others should take them seriously. Secondly, just like the FCK1, thanks to this plane Taiwan was able to buy the F16, which they were denied before because the US would have given them an upgrade over their F5 Tiger or F104, the US said something like "we'll help, but we won't upgrade them". This is also the reason why Taiwan won't get an F35 until they develop their own 5th generation fighter or similar.

As I recall, at some point before the launch of this submarine, two Korean men were charged with leaking classified domestic submarine propeller designs to Taiwan, under the guise of them being wind turbine blades. I wouldn't be surprised if those designs turn up in the Hai Kun class.

The US should pump up the taiwanese sub building industry. Our subs are too expensive for most countries, but if we can produce lesser but still quality and effective versions in taiwan we can aid their defense as well as our allies who might purchase them but would not have been able to afford US made subs anyway.

The best naval analyst ever!🇬🇧🇬🇧🇬🇧

@H I Sutton, I would like to know if there is some good online list/register of torpedos/submarines/... and theire (public) specs? Lately I'm searching pictures/specs of torpedos and tubes, I am particularly interested in how such a torpedo actually connects to the sub through glas fibre/cable

Hello, thanks for the first video on this. You have beat everyone )) There've been mentions of the Japanese technical assistance in this program, with former Mitsubishi Heavy Industries people involved, and some speculate that certain features of the Soryu class might have bled into the Hai Kun class. I certainly hope so.

Considering it is the lead ship will be intresting to see how follow-on Hai Kun-class subs will differ with design improvments likely to be added on follow-on subs

Awesome video! I wonder if you're thinking about covering the spanish new submarines,the s-80,which are look like they will be in service quite soon.

The all-lithium-ion battery power system, its original technology comes from the Industrial Technology Research Institute (ITRI) in Taiwan. ITRI ​​successfully developed the world's first high-safety battery material STOBA (Self Terminated Olygomers with hyper-branched Architecture) in 2006. In 2009, ITRI was recognized by the worldwide “R&D 100 Awards” and favored by Japanese Mitsui Chemicals, Inc. ITRI and Mitsui Chemicals signed the STOBA exclusive licensing contract. After that Mitsui Chemicals established a STOBA material production factory in Taiwan in 2016 to produce and sell safe lithium battery technology materials to Taiwanese and Japanese manufacturers.

Thanks for making this episode, been waiting for some real info.

Thanks for this analysis! So informative, especially compared to the usual reports out there.

Would you consider doing a video on the Upholder/Victoria class SSKs?

Great video, as always. Would only add, though, that some sources say the submarine will use li-ion batteryes, decreasing the need for an AIP.

The Skipjack Class was the nuclear version of the Barbel Class. Hull form, etc. were eseentially identical...

Love your video's, great work. Please keep it up. Thank you.

Great video. Can you improve sound quality? It's very boomy.

You title your video like I have a long list of defense analysts telling me about this sub ;P Nah, just you internet man. Keep up the good work!

Mr Sutton I want to thank you once again for another outstanding grade A video I don't think you get enough credit for what you share with us you have a gift my friend and I appreciate it I always look forward to your next history lesson you are the man no does it better

Taiwan took 4 years to learn and design its self-made submarine, and only took 3 years to complete its self-made modern submarine. Taiwan break the world record for manufacturing the submarine. In 1988 Taiwan was the 1st Asian country who could design and manufacture self-made 3rd generation Jet Fighter. Taiwan is also designing its own fifth-generation stealth twin-engine fighter jet, and the prototype will be produced in 2025. Taiwan is not only strong in semiconductor chip manufacturing technology, but also in other industries. Bravo Taiwan!

Can you do a video on WW2 submarines in the future? The Whiskey-class would also be very interesting. Even though they are very old, it's nice to see the progression in submarine design.

Thank you for shedding light on this topic!

Mr. Sutton, Very interesting to see. Could you do a bit on modern small boat tactics, please? Thank you.

Always informative.

Huang Shu-kuang, who is leading the program, told local media last week that lawmakers, whom he did not name, had made it difficult for the program to purchase critical equipment, and that a contractor who had failed to obtain a bid forwarded information to China.

How do you size your illustration proportions? Seems unimaginable in the manner that you create them on MS paint. The length, proportion to other lengths, so wild!

you can count the number of hard points the propeller cover encounters, which should mean the number of blade tips it has, I count at least 8 possibly 9.

The rubber tiling will probably be added later after eyes are averted.

Although Hai Kun does not have AIP, the question is - with modern batteries, is AIP even relevant anymore. I mean if you'd use equivalent amount of space and mass (compared to AIP, it's fuel, oxygen and it's auxiliary systems) to install modern LFP batteries, you could have approximately the same range boost.

What's the advantage of an x-form rudder vs. a cruciform rudder and why is the x-form high risk? Cheers.

japan definitely helped because it has the X rudder rather than the + rudder. Japanese subs are one of the very few to feature X rudder

My humble opinion is that, despite the obvious comparison to the Walrus Class with its X rudders, I can't help but notice some similarities or design references to the Oyashio Class. Specifically that the Hai Kun has the "cigar" shaped outer hull like the Oyashio, whereas Walrus still carry the teardrop shape. Also, the Walrus, like the Zwaardvis, still has the vertical sail design, whereas Haikun and Oyashio has sails that are more tapered.... Obviously with the lack of anechoic tiles, and less advanced steel materials, Haikun is definitely not in the same league as Oyashio, but I would say the 2 subs do share some similar design traits... Which shouldn't come as a surprise, as both Dutch and Japanese sub design heritage went back to the Barbel class. For better or worse, we can say that Walrus, the Oyashio, and the Haikun are distant cousins, to certain degree....

I disagree with your conclusion on the AIP. First, they are complex and cranky systems to keep operational. Second, unlike the PCR, Taiwan doesn't have a substantial coast to patrol. When Taiwan goes on a war footing, they're ports are much closer to the action and their subs can replenish much more often than the PRC. Also, while submerged a true electric is as quiet as it gets and with no obvious anechoic coatings, unless there's some between the hulls, unlikely, they will need all the innate quietness they can get.

What are the horizontal fins in the tail for?

Its so cute how your watermark is just your channel profile with aspect ratio bars. I'm not being disingenuous, keeo it thay way :)

If you zoom on the screws it’s more than 7, can’t easily make it out without digging into it. They just hung sheets over it and you can see where they are supported

Good for Taiwan !

Seems like a smart investment pathway for them. Even one of these vessels getting lose in a hot war scenario can cause immense problems for enemy shipping. Ill be interested in even the most basic specifications of the midget submarine too, the taiwan straight seems like the perfect place for such small, extremely stealthy assets.

Taiwan has successfully developed a 533mm-diameter torpedo launch system for Taiwan-made IDS submarine Narwhal. In addition to being used to launch US-made MK-48 heavy torpedoes, the system is also being prepared to launch Taiwanese-made submarine-launched Hsiung Feng II anti-ship missiles, submarine-launched Hsiung Feng III supersonic anti-ship missiles, submarine-launched Hsiung Sheng cruise missiles, and submarine-launched Sky Sword II air defense missiles. The diameters of these Taiwanese missiles, after being modified and installed in submarine-launched pods, are all smaller than 533mm torpedo launch tubes, and the IDS submarines can all launch them in the future. During launch, the torpedo tube will push the Taiwanese missile pod into the sea. After traveling a certain distance and approaching the surface, the missile engine will ignite, break out of the pod, and emerge from the water. After the guidance system is activated, the missile will fly into the sky and autonomously attack the target.

Fantastic, Monday morning and it’s an H I Sutton video. Thankyou

Taiwan had no choice. No nation in the west had the balls to sell them submarines. Shame on them: Sweden, Spain, France, Germany, Japan and South Korea !!!

It’s good that they resisted any urge to gold plate this program. A sea denial platform is needed immediately, and going with a basic boat will leave more money for surface and submersible drones.

Just FYI, the Dutch board's name is pronounced as: Zvard-fis. Meaning swordfish.

USS Albacore had and proved "X" form stern rudders. She still has those today where she is on Dry display in New Hampshire. She also proved dual counter rotating propellers.

Why would the X-tail be a risk ? The Dutch Walrusses have had them for 40 years , the German 212 has them, so do the Gotlands If you want bottom operations, it's less of a risk

For short range operations diesel electric subs are superior to nuclear. The problem is once you start the diesels to recharge the batteries everyone within one hundred miles knows what and where you are. So you have to be able to retreat to safe areas where you can recharge your batteries, and the batteries limit your range, but for coastal defense/patrol they are unmatched.

You're not butchering Zwaardvis at all, although it sounds a little bit Flemish the way you pronounce it. Great video.😁

Talk about the frontier or cutting edge. Thanks God bless.

Very interesting show. I subscribed! Happy Trails

Nice, greetings from Poland, thanks for awesome content

Towards the end you mentioneed that the future Taiwanese subs might come in an upgraded form. Would you speculate about the relative areas of improvement based on the feasability and cost of implementing them based on the existing design?

Sir! I've been patiently waiting for your analysis on the reported loss of the chinese submarine to their own trap. I wasn't aware these traps were still in use, as I figured trawlers would be snagging them constantly. As a ground pounder you're my go to source for all things little mermaid (under the sea).

While the finish of the outer hull and the sail windows etc have really no impact and you think it not a big deal you should press the same points on other subs. If this were a sub built in Iran or the DPRK those details would be seen and proclaimed to show its an inferior product. As one of the worlds best known experts its nice to hear you point this out. I would hope those watching are able to carry this knowledge forward.

Thanks , great info- detailed , much needed.

I was under the imperssion that the Hai Kun used Lithium Ion batteries *instead* of AIP, which is seen as superior to sterling engines in their ability to rum silent for longer. Am I mistaken?

Very informative , thank you

What I am most concerned about at the moment is the provision of combat system related equipment from the US, but the most important thing is the audio data of "SS, SSN, SSBN, SSGN, CG, DDG, DD, FFG, FF, SVN, CV, etc." -It's Tar-. It is a top-secret, first-class strategic asset that is being collected by the navies of each country first using acoustic observation ships. I'm curious as to whether they will actually provide this data. It may be rude to say this, but I don't think ROCNAVY has the ability to collect this much data (they don't actually own a ship like this). Plus, the way sound travels in seawater is closely related to seawater temperature (this is also common knowledge in some navies that operate submarines), which also seems to be a weakness. The advantages of a normal powered type are ``quietness'' and ``mobility''.If these two points are not excellent, you will be immediately hunted by DD and patrol aircraft. I hope you realize this soon. 現時点で一番気になるのは戦闘システム関連はUSの供与ですが、一番大事なのは”SS,SSN,SSBN,SSGN,CG,DDG,DD,FFG,FF,SVN,CV等”の音響デ－タ－です。各国海軍が真っ先に音響観測船等で収集している第１級戦略資産、超極秘です。このデ－タ－まで本当に供与するのかが気になります。こういう言い方は失礼かもしれませんがROCNAVYにここまでのデ－タ－収集能力があるとは思えません（現にこの様な船舶を保有していない）。プラス海水内での音の進み方は海水温と密接に関係している（これも潜水艦を運用している”ある程度の海軍では常識”）この点も弱いと思われる。 通常動力型のメリットは”静粛性”と”機動力”この２点が優れていないとたちまちDDや哨戒機にハンティングされてしまう。 早くこの事に気付いてほしい。

Mr. Sutton, I just want to let you know that your channel is on a short list of YT channels that get an automatic like from me right at the start. Of course I would remove it if I didn't like the video after watching, but we'll cross that bridge _if we ever get to it._ Keep up the good work! 😙👍

Mr. Sutton, would love a talk on the USS Albacore

Hai Lung Claa - in English means Sea Dragon Class ( Hai : means the Sea, Lung means the Dragon ❤❤❤

Do you think they will sell Hai Shih/Pao to the west as museum ships? I know the two did not see much action in ww2, but still would be so sad to see them scrapped. I did a video awhile back on their history too which was fun.

Thanks for sharing your expertise. 💯💯💯

Why would you say the X - form rudder is a risky design choice vs the standard rudder?

Two years is a remarkable build time for such a small country with limited production means. Although the Harpoon may be outdated by US standards, given China's limited sealift capability, a Harpoon would be an effective weapon vs a Chinese freighter.

The Taiwanese boat is using high capacity batteries from Japan..

I would love to hear a new unscripted and unedited episode ❤❤

It was Reuters which reported that young and experienced naval engineers, experts, sailors and people from private/public sector companies from US, UK, South Korea, Australia, India, Spain, Canada were secretly involved. At the official level, every country denied. Japan also denied but some Japanese workers shared on social media about their frequent visits to Taiwan which fueled speculations. An Israeli company was acting as the point of contact. There might be more countries who were involved whom we will never know. Geopolitics around Taiwan is hot.

Wonderful videos as always’

Do you think they have a photonic mast or a traditional parascope?

Thanks and salut for your very superb work, Sir !!!!!!!!!

oh i was waiting for this one, i was so curious. what a beautiful machine 😍

I'm a little curious as to why you consider the X form rudder a risky design choice? Multiple modern submarine classes have been using X form rudders for years now so it's not exactly a radical and untested new technology.

maybe parts were build abroad thats why it was build so fast. so it was maybe a bit more than just technology transfer

2:00 There's a very distracting submarine behind that lovely woman.

Taiwan is indeed creating a submarine force but I think it would also be better if the Taiwanese Government will add or plan to build numerous coastal defence submarines/shallow water attack submarines/midget submarines.

Another great vid.

Computational power is both national power and military strength. Efficient AI computation depends on high-performance AI chips, and only Taiwan's TSMC can manufacture the highest-end AI chips in the world. Taiwan's National Chung-Shan Institute of Science and Technology has completely domestically developed technologies such as stealth materials, electromagnetic wave absorption materials, and multi-spectrum radar wave scattering materials. Taiwan is also the world's largest and most technologically advanced manufacturer of carbon fiber composites. With these technological and industrial strengths, it will be a breeze for Taiwan to develop AI-powered missiles that are stealthy, can find targets on their own, counter enemy electronic warfare, and evade enemy detection. AI-powered attack drones, unmanned submarines, unmanned ships, and unmanned jet fighters will also be within Taiwan's reach. Taiwan's military industrial development strategy is clear and unambiguous. It is to leverage its technological and manufacturing industry advantages to selectively develop military industries.

Do you think there will come a point where AUV's become larger, so hold larger weapon stores and be able to do great surveillance and longer range, therefore negating the need for putting humans inside submarines?

Underwater submarines are difficult to detect. The waters around Taiwan are even more complex due to the Kuroshio Current and volcanic terrain. The Kuroshio Current, also known as the Japan Current, is a branch of the North Pacific Ocean current system. It is the second largest ocean current in the world, originating in the Philippines, passing through the East Coast of Taiwan, and flowing northeast along Japan before merging with the North Pacific Current. The Kuroshio Current has a current speed of 1 to 2 meters per second and a width of over 200 kilometers. Fish and underwater vehicles are carried along by the Kuroshio Current like they are on a highway, automatically flowing towards the North Pacific Current region. The complex deep sea area where the fast-flowing Kuroshio Current passes through stretches from the Bashi Channel region in southern Taiwan, connecting to the East coast of Taiwan, to the Miyako Strait region in northern Taiwan. Sea of East Coast of Taiwan, a "thermocline" is formed in the area where the water depth is 100 meters. Only a few sound waves can penetrate this "thermocline." Most of the sound waves are reflected back from the "thermocline" like a mirror, and continue to transmit back and forth between the "thermocline" and the surface of the sea. A sonar detection blind zone is formed below this area. Taiwan submarines and unmanned submarines can hide in this blind zone, and the Chinese military ship's sonar system or the sonar detection system thrown into the sea by anti-submarine aircraft from the sky will be unable to detect Taiwan submarines and unmanned submarines. If Taiwan submarines and unmanned submarines dive to a depth of 200-300 meters below sea level, the enemy can only use submarines to search for submarines to detect them. However, the surrounding waters of Taiwan are Taiwan's territory, especially the Bashi Channel in the southern part of the Taiwan Sea connecting to the Miyako Strait region in northern Taiwan, which is an area with unpredictable Kuroshio Currents. Chinese submarines or underwater vehicles cannot stay in this area for long. They will be automatically washed away to the North Pacific Ocean by the Kuroshio Current and will be unable to sustain combat operations here. Taiwan has already fully understood the Kuroshio Current area in the east, and is clear about the changing location of the underwater ambush zones around Taiwan throughout the four seasons. It has also deployed fixed and floating underwater sensors or unmanned submarines. Taiwan submarines and unmanned submarines are ambushed in the underwater ambush zones that move with the seasonal sea conditions, or they release denial intelligent mines in the surrounding area in advance. Chinese submarines dare not approach, for fear of being caught in the net and killed. When necessary, Taiwan's IDS submarines can dive to a depth of nearly 400 meters below sea level, where Chinese submarines cannot reach. They can then launch MK-48 torpedoes to easily destroy any enemy submarines or enemy fleet convoys that want to attack. Taiwan's geographical location is unique. The West Taiwan is separated by the Taiwan Strait to China, which is on average 180 kilometers wide, which is a natural barrier that can easily deter China's attempt to invade Taiwan by landing. The Bashi Channel in southern Taiwan connecting to the East Coast of Taiwan to the Miyako Strait in the north is an area with fast-flowing underwater currents. It is an area that cannot be stayed for long unless there is support from a nearby port. It is also a natural barrier. Taiwan's great self-made submarine capability has supplemented this block of underwater defense and combat capabilities. It can easily deter China's attempt to invade Taiwan from southern, eastern, and northern Taiwan. Taiwan's national defense is in a state of prosperity, and Taiwan can now rest assured. Taiwan's domestically produced submarines and unmanned submarines are the most important strategic weapons of national defense. Now that Taiwan has produced manned and unmanned submarines, China not only has no chance to cross the sea to invade Taiwan or blockade Taiwan, but it also has to worry about its ports being blockaded, which will completely shatter China's illusion of invading Taiwan! Taiwan's air defense missile system density is one of the highest in the world. It is impossible for the Chinese military to fly over. The Taiwan Strait in the west of Taiwan is a transparent firing line. The Chinese military ships and submarines that invade from here are tantamount to suicide. The southern, eastern, and northern parts of Taiwan are guarded by the natural Kuroshio Current barrier and the submarines and unmanned submarines of Taiwan Navy. The Chinese aircraft carrier, destroyer, and escort fleet will not dare to come.

I like it, glad they're on our side.

Do you think there is an urgent need to develop AIP for TW? Given its defensive requirements?

Great channel [:

This could be problematic to any potential amphibious landing ships.

Does this signal an improvement in Taiwan's materials and heavy industry?

The all-lithium-ion battery power system of Japan's latest generation Soryu-class submarine, Phoenix Dragon, uses high-safety, explosion-proof and fireproof lithium-ion battery materials and security control system chip patented technology transferred from Taiwan. The Japanese manufacturer obtained the technology authorization and tested it on the Japanese submarine. After five years of ensuring safety, it was officially produced and used on the latest generation of Soryu-class submarine, Submarine Phoenix Dragon. Taiwan's submarines also use this all-lithium-ion battery power system made it by itself. Because Taiwan has innovatively developed globally patented technologies for high-safety, explosion-proof and fireproof lithium-ion battery materials and security control system chips, this technology has been used in breakthrough applications on the new generation of Japanese and Taiwanese submarines, making it possible for the current owners and users of submarines based on the AIP propulsion plus lead-acid battery power system, has become outdated.