Showing posts with label Soryu. Show all posts
Showing posts with label Soryu. Show all posts

Thursday 25 February 2021

SSK Soryu's Collision Off Cape Ashizuri : Curse of the Kuroshio?

 

The damaged SSK Soryu at Kochi Port 
9th Feb 2021. Photo : Asahi Shimbun 



Collision At Sea



Collisions at sea involving submarines thankfully do not happen everyday. Even when such unfortunate incidents occur, they tend to take place at remote waters where there are not much media coverage. In any case the need to maintain operational security would ensure very little information whatsoever will be made available to the public on these mishaps.

On 8th Feb 2021, the Japanese attack submarine JS Soryu collided with the Hong Kong registered bulk carrier the Ocean Artemis while it was surfacing during a training deployment in international waters southeast of Cape Ashizuri, Kochi Prefecture. The collision occurred at periscope depth and left the Soryu with extensive damage but fortunately no fatalities.

What was unusual about this incident was the large amount of high resolution images and video footage taken of the damaged submarine after the accident. Once the word was out the Japanese news media even had reporters and cameramen flown out to sea in helicopters to film the stricken submarine, made possible also because of the accident location's proximity to land.

Many theories had been proposed by new agencies and defense web portals as to how and why the accident happened, from poorly trained sonar technicians to equipment failure to thermal layers and even professional negligence. Frequently the opinions of serving or ex-submariners were sought and while they provide a good overview of the matter, none mentioned anything about a local maritime phenomenon that could have played a significant role in causing this incident : the fast moving warm Kuroshio Current that flows northward and eastward off the Pacific coast of Japan.



The Kuroshio Current off the coast of Japan
Here for real time map by earth.nullschool.net



Cape Ashizuri, approximate collision site
and current path of the Kuroshio in red.


The Submarine Soryu



The Soryu is one of the largest and most advanced diesel attack submarine in the world. It is equipped with an air-independent propulsion system. It is also relatively new, being launched as the first-in-class in Dec 2007 and commissioned in March 2009. It has a length of 84m with a displacement of 2900 tonnes surfaced. Its sonar suite comprises of a bow array, flank arrays and a towed array. 

It could make 13 knots on the surface and 20 knots submerged. Its maximum diving depth, though classified, is believed to be between 600m to 800m.

The Soryu is assigned to the 5th Submarine Squadron, 1st Submarine Flotilla operating out of Kure. Her commanding officer is Commander Koji Keisuke ( 恒次啓介 ). The submarine had recently spent considerable time in the ship yard on routine maintenance. She left her home port on 6th Feb 2021 with 90 crew members on a training deployment, most likely for re-certification of her operational readiness.




Soryu-class submarine on surfaced transit.
Photo : JMSDF




The Bulk carrier Ocean Artemis 



The Ocean Artemis is a bulk carrier with a gross tonnage of 51208 tonnes and a dead weight of 93103 tonnes. It was built in 2011. It has an overall length of 229m with a beam of 38m. Its maximum speed is said to be 13.8 knots. It was transporting iron ore from the Chinese port of Qingdao and was heading for the Japanese port of Mizushima, Kurashiki City, Okayama Prefecture when it collided with the Soryu. AIS data suggested that the Ocean Artemis had a draught of 14.9m on the day of the collision.   




Map of Shikoku Island and Kuroshio



The seabed 50km off Shikoku is 
between 1000m to 1500m deep.
Map : Geological Survey of Japan 




Reconstructing The Collision



Based on satellite, oceanographic, meteorological and maritime traffic data, we know that it was a clear but windy day out at sea 50km southeast of Cape Ashizuri on 8th Feb 2021. The wind was gusting at 25 knots from the northwest and whipping up swells with significant wave heights of 1.59m, probably the equivalent of Sea State 4.

The collision site is located over the continental shelf of Shikoku Island and lies over waters about 1000m deep. It straddles not only the main shipping lanes south of Shikoku but also the main path of the warm Kuroshio Current. Despite being winter, the sea surface temperature was about 21C, only dropping to 15C at the 200m depth. The current is strong with a flow speed of about 2 knots and an axis of 070 degrees. 

The Ocean Artemis, laden with ore and riding low in the water, was east bound for the port of Mizushima in the Seto Inland Sea. It would likely be maintaining a course of approximately 060 degrees as she navigates around Shikoku to enter the Inland Sea from the east via the Naruto Straits. 

At 10:58am local time, the Soryu was conducting a surfacing drill when, rising from the deep, she failed to detect the presence of the bulk carrier until she was at periscope depth. It was already too late to take evasive action by the time the surface vessel was seen through the periscope and a collision was inevitable. 

The bow of the bulk carrier struck the starboard side of the submarine's conning tower, denting it and damaging the anechoic tiles covering that area. It also caused severe damage to the starboard hydroplane and the sensor masts, taking out the communications antennae. Three submariners suffered from light injuries like bruises and none required evacuation.

Since the damage occurred mainly on the starboard side of the submarine, it can be deduced that it would have been a glancing blow had the submarine been on a course similar to the bulk carrier or if it were on a reciprocal course. Conversely it would have been a head-on impact had the submarine been maintaining a southerly bearing.

We would later learn that the Ocean Artemis did not report detecting any noise or vibration from the collision and most likely continued with her voyage without even realizing that a collision had taken place.

The loss of communications rendered the Soryu incapable of reporting the incident to the 1st Submarine Flotilla headquarters. Fortunately the Soryu could still move under her own power on the surface and she eventually navigated to an area with cellphone reception. The Ministry of Defense would eventually learn of the accident by 2:20pm. 

Transiting on the surface, the Soryu made it to the port city of Kochi by nightfall. Meanwhile the JCG diverted the Ocean Artemis to Kobe the next day for investigations. There, divers discovered that the impact left multiple scratch marks with black paint residue that presumably matched those from the Soryu on the bulbous bow of the Ocean Artemis. A dent and a 20cm crack corresponding to the point of impact was also found on the bow. This crack had caused some sea water seepage into the vessel.

The black paint residue were collected and had been dispatched to the JCG Research Centre in Tachikawa City, Tokyo, for further analysis and confirmation that they originated from the Soryu.   




Underway enroute to Kochi.
Photo : 5th Regional HQ JCG



Damage to the hydroplane, sensor masts and conning tower 
of the JMSDF submarine Soryu. Photo : Mainichi Shimbun



Moored off Kochi, 9th Feb 2021
Photo : Mainichi Shimbun



Moored off Kochi, 9th Feb 2021
Photo : Mainichi Shimbun




Moored off Kochi, 9th Feb 2021
Photo : Mainichi Shimbun




Moored off Kochi, 9th Feb 2021
Photo : Mainichi Shimbun


The damaged Soryu at Kochi on 9th Feb 2021



Ocean Artemis off Kobe 9th Feb 2021
Photo : Mainichi Shimbun



Divers inspect the bow of the Ocean Artemis
Photo : Asahi Shimbun



Scratch marks on the bow of the Ocean Artemis
Photo : Jiji Press





What Caused The Collision?



Surfacing drills are among the most hazardous submarine operations undertaken during peace time. Even with modern sonar equipment, collisions with surface vessels are always a possibility especially around busy shipping lanes.

Every submarine's forward mounted sonar has blind spots known as the baffles, an area directly behind the submarine where sound detection is not possible. In order to surface safely, a submarine has first to perform a manoeuvre known as clearing the baffles to ensure there are no vessels hiding in the blind spot. It requires the boat to change its course slightly so that the previously hidden areas could now be scanned. Once the baffle is cleared, the submarine will have to execute the ascend to the surface within a specified time of not more than 10 to 15 minutes, any longer and the traffic pattern could have changed.

There is a possibility that the Soryu did not perform a proper baffle clearing or it could have taken too long to ascend after that. Her skipper Cmdr Koji Keisuke had commanded the JS Takashio ( SS-597 ) before assuming command of the Soryu on 15th Oct 2019, so he is not new to his post. However, the Soryu has recently spent considerable yard time on regular maintenance and had just resumed operational training after a long lapse. Perhaps crew proficiency may not be at the peak level and mistakes might be more common.



Clearing the baffle ( sonar blind spot )
Image : Asahi Shimbun




The same trend of thought tells us that the likelihood of the sonar specialists not reporting a surface contact as they should is also possible and could have been made more likely by their long absence from regular training. Having said that, due to the hazardous nature of operating submarines, only the best of the best gets selected to train as submariners, and MSDF personnel have to undergo rigorous training of high standards for their qualification process. So again, professional negligence, though unlikely, cannot be completely ruled out. 

Equipment failure is a remote possibility but Japan's fleet of submarine is young by other navy's standards. Until recently, JMSDF used to retire its submarines after an average of just 20 years! We also know that the Japanese tend to maintain their equipment in tip top condition, and that the Soryu had just completed its regular yard maintenance, so the scenario where there is a catastrophic failure of the sonar system leading to a collision has a low probability. In fact, Chief of the Maritime Staff, Adm Yamamura Hiroshi had already categorically denied any reports of a periscope or sonar malfunction. 

The size and draft of the bulk carrier brings up another possibility to the cause of the accident - the bow-null effect. Simply put, the enormous length of the surface vessel approaching head-on effectively acts as a shield to greatly diminish the acoustic signature from the engine and propellers which are a couple of hundred meters behind the bow. This reduced sound level could have been misinterpreted to be emitted from a source much further away along the same bearing, leading to a potentially disastrous situation. Even veteran submariners have had close shaves due to the bow-null effect. It has also been postulated to be the cause of many collisions between whales and large surface vessels.

Apart from human errors and equipment failures, environmental and geographical factors frequently have a contributory if not causative role to play in such accidents. For submarines, water temperature, depth and to a lesser extend, salinity, will have a huge impact on sound transmission. The existence of shallow thermal layers for example, might create environments with positive sound velocity profile gradients, causing some surface generated sound waves to be deflected upwards. It would result in shadow zones below the layer and make vessel detection from beneath all but impossible. The Kuroshio could have contributed to the creation of such thermal layers.



The Black Tide



The collision took place on a winter's morning in an area known to have high maritime traffic, over the continental shelf extension of Shikoku with depths of approximately 1000m. February is typically the coldest month of the year in the northern hemisphere and being located in the temperate zone one could logically expect the sea surface temperature around Japanese waters to be cold as well, causing thermal layers commonly encountered in warmer months to be greatly diminished or even dissipate altogether. 

That would well be the case if not for the powerful Kuroshio Current which brings warm water from the tropics to the Japanese archipelago all year round. Kuroshio ( 黒潮 ) means black tide in Japanese. It is named because of its nutrient poor, deep blue, clear waters. It is one of the world's major oceanic currents comparable to the Gulf Stream of the Atlantic. The impact of this warm current on Japanese climate and maritime related industries is so great that the Japan Coast Guard monitors its activities constantly and issues daily reports.



JCG Quick Bulletin of Ocean Conditions
Path of Kuroshio & Tsushima Currents
Flow speed is 2 knots south of Cape
Ashizuri on 8th Feb 2021





Sea Surface Temperature off Cape
Ashizuri is about 21C on 8th Feb 2021




Because of the Kuroshio Current, the sea surface temperature south of Cape Ashizuri where the collision occurred remains at 20C to 22C in winter and between 26C to 28C in summer. So even in winter a significant layer of warmer water will exist above the colder water deeper below. How deep is warm layer gets depends on factors such as the current's flow rate, mixing from colder layers below and even eddies that form when the current is deflected by geological features or when it meets another ocean current, like the southward flowing cold Oyashio current from the Kuril Islands. 

It is a well known fact that the salinity and water temperatures can vary considerably especially at the boundaries of the tide, making navigation with sonar extremely tricky. To complicate matters, the path of the black tide is not always fixed and can sometimes shift quite drastically in what is known as the " Great Meandering " ( 黒潮大蛇行 Kuroshio Daidako ) especially off the Kii Peninsula east of Shikoku Island.



Sea Surface Temperature 20.6C
Flow Direction 070
Flow Speed 0.94m/s ( 1.88 knots )




Significant Wave Height 1.59m
Peak Wave Period 5.2s
Direction 305 deg



Surface Wind 25.5 knots
Direction 310 deg




The waters around the collision site is 
approximately 1000m deep.
Bathymetry from Japan's Submission to
the Commission on the Limits of the
Continental Shelf.



Maritime traffic density 2012
Image : shipmap.org



The Aftermath



The JMSDF has not been all forth coming with information on the collision. There were no mention of the incident on its website and social media accounts. The Minster for Defense and the Chief Cabinet Secretary did have press conferences and the MOD had a press release, but that was it. Some of the images and videos came from the JCG but mostly they were from the news media. Investigations are ongoing and hopefully the findings will be released soon. 

Since the Kuroshio Current dominates over almost the entire Pacific coast of Japan, I am convinced that the collision has something to do with it, barring other factors such as human error. Its high flow volume of very warm water creates a perpetual summer-like condition to Kyushu, Shikoku and Western Japan extending eastwards to the Kanto region at times. Its ever changing flow axis with major deviations and meandering and its multitude of eddies and countercurrents where there are deflections by land masses and confluences with other currents means that it is as unpredictable as can be, creating treacherous acoustic environments for submarine navigation. 

As usual, most accidents are caused by cumulative errors committed by all parties involved, but sometimes it can boil down to just pure bad luck, like being at the wrong place at the wrong time. The Soryu unfortunately has quite a long history of mishaps .... from electrocution and burns at the shipyard to attempted suicide and the accidental drowning of three petty officers within the flooded areas of the sail during routine operations in 2012. 

At the time of writing, the Soryu is back in Kobe where the Mitsubishi Heavy Industries Shipyard is located, presumably for damage assessment and repairs. Even though her pressure hull wasn't damaged, it could still possibly be out of active duty for several months and the repairs could cost several tens of millions of dollars.

Cmdr Koji will likely be relieved of his command regardless of the cause of the collision and the outcome of the investigations. His career as a sub-driver or even his future in the JMSDF could already be jeopardised. 

Meanwhile, the MOD decided that a 3.5 hour delay in incident reporting due to communications failure is utterly unacceptable and the JMSDF has pledged to ensure the availability of satellite phones on their vessels and boats.


Cmdr Koji Keisuke
Photo : JMSDF




Foot Note : Cape Ashizuri



It would not be right to end this article without elaborating on Cape Ashizuri. Known in Japanese as Ashizuri Misaki ( 足摺岬 ), this is the southernmost point of Shikoku Island. It is located in the remote western part of Kochi Prefecture where the pristine Shimanto River lies, with rugged coasts and beautiful night skies. 



Cape Ashizuri Lighthouse
Photo : JNTO



I had visited Cape Ashizuri in Feb 2017, after completing the Kochi Ryoma Marathon. Accessibility was an issue as the rail network did not extend to that region and even driving along the winding coastal roads was tedious and time consuming. But the effort was well worth it.

The Cape lies within the Ashuzuri-Uwakai National Park and it has majestic sea cliffs that towers above the vast expense of the Pacific Ocean. I remembered that it was extremely windy when I visited the Cape Ashizuri Lighthouse and walked through the tunnel of camellia which was in full bloom.




Cape Ashizuri is the southernmost
point of Shikoku Island. Statue
of John Manjiro in the Background.
Photo : Author



Another attraction at Cape Ashizuri is the statue of John Manjiro ( 中浜万次郎 ), a Japanese whose remarkable story I first learnt only during that visit. Manjiro had hailed from Nakanohama, an area known today as Tosashimizu, not far from Cape Ashizuri. 

Manjiro came from a poor family and lost his father at a young age. In 1841 when Manjiro was fourteen years old, he left home to work on a fishing vessel to help make ends meet. Unfortunately, due to inclement weather, he was shipwrecked on an uninhabited island off the coast of Japan for six months. Manjiro was eventually saved by the captain of a passing American whaler who named him John and brought him back to his hometown of Fairhaven, Massachusetts, so that he could be educated. 



Statue of Nakahama John Manjiro
at Cape Ashizuri. Photo : Wikipedia


Manjiro stayed in America for ten years, learning English and the science of navigation among other things, becoming the first Japanese to achieve long term residency in America. All that during an era when the ordinary Japanese were forbidden to travel or interact with foreigners! He would later join a whaling ship and work his way up to become the first mate and even participated in the California Gold Rush, earning enough money to fund his journey back to Japan. 

Upon his return, instead of meting punishment for violating the travel ban, the Shogunate government found his knowledge in English and foreign ways valuable and made him an advisor. He was also the translator for Japan's first trans-Pacific delegation to San Francisco and was appointed a lecturer at the Kaisei Institute dedicated to the teaching of foreign languages, science and advanced western technologies, paving the way for the Meiji Restoration and the industrialization of Japan which followed shortly. 

John Manjiro's story is worthy of an article all by itself but fortunately all the details can be found here.












Friday 28 December 2018

Kure's Submarine Alley





From Alley Karasukojima : Two Soryu-class submarines belonging to
Submarine Squadron 5, 1st Submarine Flotilla at Kure Naval Base.



Alley Karasukojima



There is a unique place in Japan where anyone could visit and view the submarines and ships of the Japan Maritime Self-Defense Force ( JMSDF ) at close range and for free. It is known as Alley Karasukojima Park ( アレイからすこじま公園 Arei Karasukojima Koen ) and it is located in Kure City, Hiroshima Prefecture.

Often listed as a seaside park, Alley Karasukojima is nothing more than a narrow strip of wharf-side walkway with a few trees and flower beds and with a car park that is rather far away and uphill. Unremarkable as it sounds, it is the view from here that will blow the mind of any naval enthusiast away. Standing by the water's edge, the visitor will be directly facing the piers where the warships and the submarines of the JMSDF are docked. The coming and going of the naval vessels and all dockside activities can be observed without restrictions anytime of the day or night.


Panoramic view of Alley Karasukojima

 

Historical Background



Kure has always been an important part of Japanese naval history being designated as the second of four naval districts ( 鎮守府 Chinjufu ) as far back as 1889. Its location along the shores of the Seto Inland Sea conferred strategic importance in the sea control of western Japan. The establishment of the Kure Naval Arsenal in the following year would eventually make Kure one of Japan's most important shipbuilding sites for capital warships including the Yamato. In modern times Kure continues to be a major JMSDF base and also hosts the headquarters of the Kure Naval District whose area of jurisdiction stretches from the western half of Kyushu to the Kii Peninsula of Kansai.

What we know today as the Alley Karasukojima Park was once the sea fronting the headquarters and arms manufacturing plant of the Kure Naval Arsenal. A seawall made of rocks was constructed there in the year 1895.

There was a small island there known as Karasukojima ( 烏小島 ) or Bird Island with a perimeter measuring just 40 meters and it was used as a training ground for torpedo launching during the Taisho Period ( 1912 - 1926 ). Karasukojima eventually disappeared due to land filling.

Following World War II, the area was used by the British Commonwealth Occupation Force up to 1956. In 1985 the city of Kure developed the site as a park and combining with the English word alley, named it after the little island that was once there.

Located in the immediate vicinity of HQ 1st Submarine Flotilla JMSDF, this park is the best venue to observe Japanese submarines up close. There are also old brick houses built in 1897 during the Meiji Period on the opposite side of the street along the sea front with historical significance. They once housed the electrical department of the Kure Naval Arsenal but are now used as warehouses by private logistics firms. Together with the old embankments, these brick houses and related structures at the Alley had been awarded heritage status by the Japan Society of Civil Engineers ( JSCE ) in 2009. An old crane which was once used to load torpedoes currently still stands and is one of the most recognizable features of the park.



Civil Engineering Heritage Award : Granite embankment and torpedo loading crane.
Photo : JSCE


Visiting Alley Karasukojima



I visited Alley Karasukojima Park on the afternoon of 6th Dec 2018 which happened to be a very cold and rainy day, not the best time for a good view but that was all the time I could afford. It is probably best to drive yourself to this location as there are no train stations nearby. The park is served by public buses though and taxis are always an option.

A public car park is available for visitors but it is located some 300m from the park up a small hill. It is impossible to miss as there is a prominent sign featuring a submarine fixed to the gate grills. The car parks immediately across the road next to the park are owned by the convenient store and wharf side café and are reserved for their customers.


The Café, Convenient Store and Meiji Era brick buildings in the background. 


Parking is free for visitors to Alley Karasukojima.


Once at the sea front, I could see many submarines and surface vessels berthed at the piers and the naval personnel walking along the docks. Some can be identified by their pennant numbers like the training support ship Tenryu ( ATS-4203 ) which carries the BQM-34AJ and BQM-74E target drones. Not being able to read the pennant numbers through the rain and sometimes by obstruction from line of sight, the submarines I could still identify by their class based on the shape of stern planes. The X-shaped ones being the newer Soryu-class SSK while the vertical ones denotes an older Oyashio-class SSK. Other ships seen at the piers included the submarine rescue ship ASR-403 Chihaya, Destroyers DD-105 Inazuma and DD-158 Umigiri, and Japan's future aircraft carrier DDH-184 Kaga. Here are some of the photographs taken on that day.



The Alley is just a narrow strip of real estate between the road and the sea.
The ships and submarines can already be spotted from across the road.


The visitor can walk right to the water's edge next to the pier.




Close-up view of Training Support Ship ATS-4203 Tenryu
from Alley Karasukojima.


Naval personnel on the pier with destroyers DD-105 Inazuma
and DD-158 Umigiri in the background.
The capital ship furthest away is probably DDH-184 Kaga.


A couple of Oyashio-class submarines with the
submarine rescue ship ASR-403 Chihaya on the left.
 
 
A closer view of ASR-403 Chihaya with the Oyashios.



ATS-4203, ASR-403 and Oyashios.



Two Soryu-class with X-form stern planes.


The two Soryu-class submarines with DD-105 and DD-158



 
The torpedo hoist that miraculously survived the WWII bombing raids on Kure.
Photo : Wikipedia
 

The Alley is accessible 24/7. Night scene with
ASR-403 Chihaya and Oyashios circa 2008. Wikipedia


So, two Soryu-class SSK, two Oyashio-class SSK, ASR-403 Chihaya submarine rescue tender, DD-105 Inazuma, DD-158 Umigiri and DDH-184 Kaga, all spotted in one location. I almost wished I had a longer zoom lens. 300mm it seems may still be somewhat lacking. It might have been better if the weather was clear and sunny.

I also learnt that on most Sundays, the JMSDF conducts ship open house events for the public. Different ships will be made available for public viewing on different weekends. For example ATS-4203 Tenryu open house is scheduled for 13th Jan 2019. Check the JMSDF Kure Regional Forces website for more details ( Japanese only ).


Kure Kaiji Curry based on the recipe
from SS-596 Kuroshio


And while you are there, you might as well check out the café across the road from the Alley for some authentic Kure Kaiji curry ( 海自カレー ). Kaiji is the abbreviation for JMSDF in Japanese. These are curry dishes based on recipes taken from the galley of the various naval ships and submarines home ported in Kure. The Minatocho Kohiten Café ( 港町珈琲店 Wharf District Coffeeshop ) serves Hiroshima-styled soft beef curry from the recipe of the submarine Kuroshio for only JPY1058 ( about US$10 ), inclusive of salad and drink. There is even an official website for Kure Kaiji Curry, no kidding .... but it is in Japanese though.




If you happen to visit Hiroshima, why not make a detour to Kure?




Tuesday 3 May 2016

Australia Selects Shortfin Barracuda, Hands DCNS A$50 Billion On A Platter



The DCNS Shortfin Barracuda Block 1A SSK. Image : DCNS Australia



SEA1000 Future Submarine Program



Merci! That's the least the French could say. Ouch! That's the pain that would come from parting with A$50 billion, after the initial euphoria is over. And Oh ****! would be the response with the realization of the enormity of the task ahead.

Australia's quest to replace its current fleet of six Collins-class conventional diesel electric attack submarine is officially known as the SEA1000 Future Submarine Program. It aims to provide the Royal Australia Navy with " an affordable, regionally dominant, conventional submarine capability, sustainable into the foreseeable future ", so that it can safeguard its sea lines of communication and its economy which is worth A$1.6 trillion annually.

The Aussies wanted them BIG and they wanted them quick. Twelve boats are needed in total. They have to be constructed locally in Australia and they had to have American combat and weapon systems. As there were no off-the-shelf options that can fulfill Australia's unique operational requirements, they began looking for an international partner to design and build their next generation boats, the details of which can be found here. After a long drawn competitive evaluation process, Prime Minister Malcolm Turnbull announced last week that the French Shortfin Barracuda designed by DCNS had been selected, thus ending months of speculation by defense analysts as well as the general public alike.


DCNS Shortfin Barracuda Block 1A


The Shortfin Barracuda is actually a conventionally powered variant of the Barracuda-class nuclear attack submarine ( SSN ), specially customized for Australia. It is brilliantly named after the Australian Barracuda or Shortfin Barracuda whose scientific name is Sphyraena novaehollandiae.

French national ship builder DCNS needs no further introduction. Malaysia's Gowind-class frigates and Scorpene-class SSK, Singapore's Formidable-class stealth frigates, and the Mistral-class BPC so coveted by Mr Putin, were all constructed by this innovative company.

The Barracuda-class submarine currently under construction for the French Navy is France's second generation nuclear attack submarine meant to replace their six Rubis-Amethyste-class SSNs. It displaces 5300 tons submerged and 4765 tons surfaced and measures about 100m in length. Its nuclear reactor provides an unlimited range, requiring refueling and complex overhaul ( RCOH ) only once in ten years. Its endurance is about 70 days, the limiting factor being the amount of food it can carry for its crew. It is extremely stealthy and quiet, featuring pump jet propulsion instead of propellers. It can be armed with a variety of weapons including torpedoes, mines, SM39 block 2 Exocet anti-ship missiles and SCALP Naval land attack cruise missiles. First-in-class FS Suffren is scheduled for launch in 2017 and the six boats cost the French government €9.9billion.


The Shortfin Barracuda debuted as the SMX-Ocean SSK at Euronaval 2014 and quickly evolved into its current form as the world's most advanced conventional submarine customized for Australia's needs. It will be slightly shorter than the Barracuda SSN at 97m and also smaller, displacing some 4500 tons when surfaced and " more than 4000 tons ", probably closer to 5000 tons, submerged. Powered by diesel engines and advanced fuel cell air-independent propulsion system, it can remain underwater for up to 3 weeks and has a range of 18000nm ( 33300km ) at 10 knots and an endurance of 80 days at sea. Maximum diving depth is 350m or deeper and its maximum speed will be 20knots. It will have a complement of 60 officers and ratings, plus it can carry another 20 special forces personnel.

It will have " the most powerful sonar ever produced for a conventional submarine " and the same pump-jet propulsion system and the same enhanced stealth features inherited from its nuclear cousin. Pump-jet technology is said to make propellers obsolete, as they can be a thousand times quieter and achieve much higher speeds before cavitation ( bubbling phenomenon ) occurs. It also allows for high maneuverability with the addition of a steerable nozzle, creating vectored thrust. However, it can be less efficient than propellers at low speeds. Other notable features include an X-rudder like the Japanese Soryu boats where the four blades can twist and turn in different permutations and provides superior maneuverability especially in shallow waters, retractable hydroplanes which reduces drag and noise, non-hull penetrating optronic masts and special hull hatches for easy upgrading in the future.

Its combat system and weapon systems will be American, as the Aussies value interoperability with their closest ally the United States. So we can expect an improved version of the AN/BYG-1 combat system, Mk48 Mod 7 Common Broadband Advanced Sonar System ( CBASS ) heavy torpedoes jointly developed by the US and Australia, UGM-84 submarine launched harpoon missiles, UGM-109E Tomahawk land attack cruise missiles, Mk60 CAPTOR mines, Mk67 submarine launched mobile mines and such. Swimmer delivery hatches, unmanned underwater vehicles ( UUV ) will probably be part of the package as well.

At A$50 billion, it is Australia's single biggest defence procurement to date, though this spending will be spread out over the next thirty years or so. At least two thirds of this money will be allocated for future upgrades, sustainment, operations and in-service support of the submarines which means the initial builds would cost A$20 billion or less.

Here's a video of the Shortfin Barracuda from DCNS.










The Shortfin Barracuda : Australia's Future Submarine. Image : DCNS



The Shortfin Barracuda with tiny hydroplanes extended. Image : DCNS


X-rudders and pump-jet propulsion. Image : DCNS



The original SMX-Ocean SSK and the Barracuda SSN side by side. Image DCNS


Why The French Won


The Swedes were eliminated early in the race, due largely to the fact that they had not built a single submarine independently for the past two decades, and perhaps also because they were the designers of Collins-class submarines which were giving the RAN so much trouble.

Of the three that made it to the competitive evaluation process phase, the Germans were dropped for concerns that they had not built anything more than 2000 tons so far, even though they were the most prolific boat builders, supplying more than 160 modern SSKs to navies worldwide.

The Japanese Soryu-class submarine was not chosen purportedly because it lacked the range that the Aussies desired. The berthing compartment is also too small for the Australian sailor who typically have a taller stature compared with their Japanese counterparts, this even after a 6 to 8m hull lengthening modification.

The French design, on the other hand is not only super stealthy but also technologically the most advanced, and most importantly has the range equal to or exceeding those of the existing Collins-class boats. DCNS had also the expertise in building submarines up to 14000 tons in the form of nuclear ballistic missile submarines ( SSBN ) or boomers, like the four Triomphant-class boats currently in service with the French Navy.


 



You can see for yourself why the Shortfin Barracuda could have been so appealing to the Aussies through the above video made by DCNS on the operational capabilities of the SMX-Ocean some months ago.



Constructing the Shortfin Barracuda



All the construction of the Shortfin Barracuda submarines will be done in Australian naval shipbuilder ASC's Adelaide shipyard with the help of DCNS. The project can generate 2900 jobs locally and will no doubt be a great boost to the South Australian economy for many years to come. Because submarines are among the most complicated machines that humans have ever designed, the task ahead for ASC is huge and they know it, describing the construction of the Collins-class SSK as an unprecedented feat of engineering, design and logistics in Australia. Work had to be co-ordinated with 150 major contractors and hundreds of smaller suppliers and many modules were constructed off-site and then shipped to Australia for integration at ASC. Some 33000 drawings and 5000 work orders had to be issued before work could even begin and each submarine required 250000 man-hours over 60 months to assemble. The Shortfin Barracuda is light-years ahead of the Collins in terms of complexity and the question now is whether ASC is up to the job. DCNS Australia describes the task as mammoth and at least twice as big as the Collins project.

For A$50 billion, France has promised the Australians full transfer of stealth technology utilized in their SSN and SSBN submarines, the crown jewels of their submarine designs that they have never shared with anybody else before. Even though the submarines are to be constructed in Australia, another 4000 jobs will be created in France itself in support of the Shortfin Barracuda project.

Looking ahead, contract signing will probably take place in 2017, construction will start between 2022 to 2024 and the first submarine will probably launched in 2028 and be commissioned by 2030. The Shortfin Barracuda is expected to remain cutting edge in terms of operational capabilities until 2060 and will probably in active service until 2070. If the Collins boats were to be retired starting from 2025 as planned, there will be a capability gap which the RAN has to address. The most likely solution will be to have some sort of life extension program to postpone the decommissioning of the Collins-class, but then again, I'm not sure if that's tantamount to flogging a dead horse.


The Shortfin Barracuda firing a presumably Mk48 Mod 7 CBASS torpedo. Image : DCNS


Winners and Losers


Apart from France, South Australian politicians and the naval shipbuilding industry of Australia are big winners as they successfully canvassed for the submarines to be completely constructed in Australia, never mind the competency of the local work force or the available infrastructure. The construction and more importantly the sustainment of the submarine fleet meant that a constant flow of jobs and money into South Australia will be almost a guarantee for the next fifty years.

The Royal Australian Navy could be big winners with the chance of a lifetime to once and for all rectify all the misgivings of the Collins and acquire an underwater capability way beyond their current level and maintain it that way for decades to come, but only if the submarine construction goes smoothly. Chances of that happening is almost close to zero, if historical events could be used as a gauge. Not only had ASC bungled the Collins construction and their subsequent upgrading and sustainment, they have, as part of a consortium, continued to mess up the until now the most expensive defence procurement - the A$8 billion SEA4000 Air Warfare Destroyer project. The Hobart-class AWD are 3 years late with an estimated A$1.2 billion in cost overruns. Its going to be difficult even just to be cautiously optimistic.

Japan was the early favorite in the race for SEA1000, with Shinzo Abe and Tony Abbott being good pals and the inking of a contact for joint development of submarine technology in 2014. Even the Americans also favoured the Japanese since they too have a direct stake in this mega-project as the provider and integrator of the combat and weapons system and would have to work with whoever the Australian chose. An American-Australian-Japanese alliance would also be a good thing to check Chinese ambition in the South China Sea. However, lack of experience with international arms deals and the subsequent ousting of Tony Abbott as prime minister probably doomed the Japanese effort. Japan did not agree to support full construction of the submarines in Australia until very late in the game, after France and Germany had indicated their willingness to do so. Their team of negotiators sent to Australia was said to be comprising of a mix of business executives and Ministry of Defence bureaucrats who had never worked with each other before. Of course the oriental way of business conduct, where a handshake alone would seal a deal, where trust and honour is valued above all else, might be perceived very differently in western cultures.

It is not surprising that Japan was rather peeved to learn that the deal had gone to their competitor when they had invested so much time and effort and that just slightly more than a year ago, they were the front runners. Turnbull will have a great time trying to pacify them and manage the fallout. While the two countries pledged to continue their co-operation in defence research the relationship will never be the same. Hopefully Japan will learn from this experience and turn failure into success in future deals.


Best Submarine at the Best Price?


That was what Tony Abbott promised the Australians but that's not what they are going to get. The entire project had been hijacked by the politicians who have their own agendas to field and don't give a damn what happens a decade or two in the future when they will probably no longer hold office. Building the submarines in Australia is widely reported to carry with it a 30% to 40% premium as opposed to constructing them in their country of origin. The risk of delays and cost overruns is extremely likely given the size and complexity of the project as well as the quality of the local work force. Even if the French design had been chosen on merits of technological advancement, the Aussies could have at least let the French handle the construction in France. What's the use of the best submarine in the world if it can't be put to sea half the time and the other half of the time is spent combating defects?

A procuring a submarine fleet is a long term investment, a strategic partnership that will bind the two countries, in this case France and Australia, for the next 50 years. Good or bad the Aussies would have been stuck with the deal for the next half a century. These submarines are not disposable if anything goes wrong since they are highly customized for Australia's needs and probably nobody else can afford them anyway. The Australian Navy will really have to keep its fingers crossed. As the quest for better submarines continues, we can only wish the RAN Bon Voyage!