Deep-submergence vehicle

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In 1960, Jacques Piccard and Don Walsh were the first people to explore the deepest part of the world's ocean, and the deepest location on the surface of the Earth's crust, in the bathyscaphe Trieste designed by Auguste Piccard. Bathyscaphe Trieste hoisted.jpg
In 1960, Jacques Piccard and Don Walsh were the first people to explore the deepest part of the world's ocean, and the deepest location on the surface of the Earth's crust, in the bathyscaphe Trieste designed by Auguste Piccard.
Historical deep-submergence vehicles World Deep Submergence Vehicles as of December 2020-1.jpg
Historical deep-submergence vehicles

A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled.[ citation needed ] Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs (deep-submergence rescue vehicles), which are intended to be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions (primarily installing wiretaps on undersea communications cables), or both.[ citation needed ] DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.

Contents

Strictly speaking, bathyscaphes are not submarines because they have minimal mobility and are built like a balloon, using a habitable spherical pressure vessel hung under a liquid hydrocarbon filled float drum.[ citation needed ] In a DSV/DSRV, the passenger compartment and the ballast tank functionality is incorporated into a single structure to afford more habitable space (up to 24 people in the case of a DSRV).

Most DSV/DSRV vehicles are powered by traditional electric battery propulsion and have very limited endurance, while a few (like NR-1 or AS-12/31) are/were nuclear-powered, and could sustain much longer missions. Plans have been made to equip DSVs with LOX Stirling engines, but none have been realized so far due to cost and maintenance considerations. All DSVs to date (2023) are dependent on a surface support ship or a mother submarine that can piggyback or tow them (in case of the NR-1) to the scene of operations. Some DSRV vessels are air transportable in very large military cargo planes to speed up deployment in case of emergency rescue missions.

List of deep submergence vehicles

Trieste-class bathyscaphes

FNRS-2
The first bathyscaphe, developed by Swiss engineer Auguste Piccard and named after the Belgian Fonds National de la Recherche Scientifique (FNRS), the funding organization for the venture. FNRS also funded the FNRS-1, a balloon that set a world altitude record, also built by Piccard. This bathyscaphe consisted of a gasoline filled float, 22 feet long and 10 feet wide, and oval shaped. Gasoline being less dense than water, would provide buoyancy for when the bathyscaphe needed to rise to the surface. [1] The ovular float was divided into six tanks for holding gasoline, having a combined total of 6,600 gallons. [1]
FNRS-3
After damage to the FNRS-2 during its sea trials in 1948, the FNRS ran out of funding and the submersible was sold to the French Navy in 1950. It was subsequently substantially rebuilt and improved at Toulon naval base, and renamed FNRS-3. It was relaunched in 1953 under the command of Georges Houot, a French naval officer.
DSV-0 Trieste
The X-1 Trieste bathyscaphe has reached Challenger Deep, the world's deepest seabed. It was retired in 1966. [2]
DSV-1 X-2 Trieste II
An updated bathyscaphe design, it participated in clandestine missions. Trieste II was retired in 1984. [3] [4]

Alvin-class submersibles

Originally designed for 6,000 ft (1,800 m) operation, and initially built to a similar design, Alvin and her sister submersibles have been subsequently, independently upgraded. [5] Utilizing syntactic foam, these submersibles were more compact and maneuverable than earlier bathyscaphes like Trieste, although not as deep diving.

DSV-2 Alvin
Launched in June 1964 with an initial depth capability of 6,000 ft (1,800 m); rebuilt in 1973 to 4,500 m (14,800 ft). Owned by the United States Navy and operated under secondment by the Woods Hole Oceanographic Institution (WHOI) where it conducts science-oriented missions funded by the National Science Foundation (NSF), National Oceanic and Atmospheric Administration (NOAA) and the Office of Naval Research (ONR). [6] Alvin operates from R/V Atlantis, an AGOR-23 class vessel owned by the ONR and operated by WHOI under a charter party agreement. In 2004, the National Science Foundation funded a 6,500 m (21,300 ft) capable replacement for Alvin, however the key components, such as a new titanium personnel hull, and funding were used to substantially rebuild Alvin in 2011 and 2020 instead. [7] In 2022, Alvin was certified for 6,500 m operations. [8]
DSV-3 Turtle
Alvin's identical sibling, launched in December 1968 and retired 1998. Owned and operated by the United States Navy. [9]
DSV-4 Sea Cliff
Another Alvin-class DSV sub, launched in December 1968, retired in 1998, and returned to active service in September 2002. Since 1981, Sea Cliff has a depth capability of 6,000 m (20,000 ft), [5] and is owned and operated by the United States Navy. [10]
DSV-5 Nemo
Another Alvin-class DSV sub, launched in June 1970 and retired in 1998. Owned and operated by the United States Navy. [11]

Star-class DSV

Star II
Star III

Both Star II and Star III were built by General Dynamics Electric Boat Division in Groton, Connecticut. Both were launched on May 3, 1966, and were used for civilian research.

NR-1–class DSVN

NR-1
a decommissioned US Navy nuclear powered research and clandestine DSV submarine, which could roll on the seabed using large balloon wheels. [12]

Aluminaut

Aluminaut
a DSV made completely of aluminum by the Reynolds Metals Aluminum Company, for the US Navy, once held the submarine deep diving record. [13] It is no longer operational.

Deepsea Challenger

Deepsea Challenger
a DSV made by the Acheron Project Pty Ltd, has reached Challenger Deep, the world's deepest seabed.

Limiting Factor

DSV Limiting Factor of Triton Submarines during sea trials Limiting Factor at the Cumberland East Bay (South Georgia Island).jpg
DSV Limiting Factor of Triton Submarines during sea trials

A submersible commissioned by Caladan Oceanic and designed and built by Triton Submarines of Sebastian, Florida. On December 19, 2018, it was the first crewed submersible to reach the bottom of the Atlantic Ocean, or 8,376 meters in the Brownson Deep, thus making it the deepest diving, currently operational submersible. [14] In August 2019, the submersible and its pilot, Victor Vescovo, completed the "Five Deeps Expedition" with its support ship, the DSSV Pressure Drop, becoming the first submersible to visit the bottom of all five of the world's oceans. [15] Earlier that same month, a team of explorers and scientists used Limiting Factor to visit the wreck of the RMS Titanic in the North Atlantic Ocean. [16] On March 31, 2021, Caladan Oceanic announced having re-located, surveyed, and filmed the wreck of the World War II destroyer USS Johnston, sunk on October 25, 1944, in the Battle off Samar (in the Philippine Sea off Samar Island). Johnston lies at depth of 21,180 ft (6,460 m), making Limiting Factor's expedition the deepest wreck dive in history. [17]

Priz-class DSRV

Priz
a DSRV class of five ships built by the USSR and Russia. The titanium-hulled Priz class are capable of diving to 1,000 metres (0.62 mi). These mini-submarines can ferry up to 20 people for very brief periods of time (in case of a rescue mission) or operate submerged for two to three days with a regular crew of three to four specialists. In early 2005, the Russian AS-28 Priz vessel was trapped undersea and subsequently freed by a British ROV in a successful international rescue effort.

Mir

Mir
a strictly civilian (research) class of two DSVs which were manufactured in Finland for the USSR. These bathyscaphe-derived vessels can carry three people down to depths of 6,000 metres (3.7 mi). After visiting and filming the RMS Titanic's wreck, the two Mir submersibles and their support ship were loaned to a US Pacific trench surveying mission in the late 1990s and made important discoveries concerning sulphuric based life in "black smokers".

Kalitka-class DSVN

AS-12
a Russian counterpart to the American NR-1 clandestine nuclear DSV, is a relatively large, deep-diving nuclear submarine of 2,000 tons submerged displacement that is intended for oceanographic research and clandestine missions. It has a titanium pressure hull consisting of several conjoined spheres and able to withstand tremendous pressure — during the 2012 research mission it routinely dove to 2,500 to 3,000 metres (1.6 to 1.9 mi), [18] [19] with maximum depth being said to be approximately 6,000 metres (3.7 mi). Despite the three-month mission time allowed by its nuclear reactor and ample food stores it usually operates in conjunction with a specialized tender, a refurbished Delta III-class submarine BS-136 Orenburg, which has its missile shafts removed and fitted with a special docking cradle on its bottom.

Konsul-class DSV

Konsul
a class of Russian military DSVs currently deployed onboard the Russian oceanographic research ship Yantar. It is reported that the submersible and its sister sub Rus are used to conduct seafloor surveillance of marine communications cables and western underwater surveillance devices. [20] They are somewhat smaller than the Mir's, accommodating a crew of two instead of three, but are purely domestically produced vessels and have a higher maximum depth due to their titanium pressure hulls: during the tests the original Konsul dove to 6,270 metres (3.90 mi). [21]

Nautile

Nautile
a DSV owned by Ifremer, the French Research Institute for Exploitation of the Sea. The titanium-hulled Nautile is capable of diving to 6,000 metres (3.7 mi).

Shinkai

DSV Shinkai
JAMSTEC (Japan Agency for Marine-Earth Science and Technology) operated a DSV series called Shinkai ("Deep Sea"). The latest DSV is Shinkai 6500 which could submerge to 6,500 metres (4.0 mi) with three crew members. JAMSTEC was operating a ROV called Kaikō, which was able to submerge to 11,000 metres (6.8 mi), but was lost at sea in May 2003. [22]

Pisces-class DSV

Pisces-class DSV
three-person research submersibles built by International Hydrodynamics of Vancouver in British Columbia with a maximum operating depth of 2,000 metres (1.2 mi) capable of dive durations of 7 to 10 hours. A total of 10 were built and are representative of late 1960s deep-ocean submersible design. Two (Pisces IV and Pisces V) are currently operated by National Oceanic and Atmospheric Administration and the first production vehicle is on display in Vancouver. Pisces VI is undergoing retrofit.[ when? ]

Sea Pole-class bathyscaphe

Bathyscaphe series designed by the People's Republic of China, and there are three derivatives known to exist by 2010:

Sea Pole-class bathyscaphe
1 built, 2nd unit developed into Jiaolong (Described below)
Jiaolong-class bathyscaphe
Subclass of Sea Pole class, 1 built.
Harmony-class bathyscaphe
Subclass of Jiaolong class, 1 built.

Fendouzhe DSV

Fendouzhe, or Striver-class
a Chinese DSV that dove to an estimated depth of 10,909 meters in the Mariana Trench on November 10, 2020, the deepest ever for a Chinese submersible. It was supported by its mother ship, the Tansuo-1 (Exploration-1) and its development began in 2016. [23] [ better source needed ] The chief designer of the sub, Liu Yeyao, and two other Chinese oceanauts made the descent in what was the first three-person, welded titanium capsule to venture to full ocean depth. [24] [ better source needed ]

Deep Sea Warrior bathyscaphe

Deep sea warrior or "Shen-Hai Yong-Shi"
developed by China Shipbuilding Industry Corporation in 2017 and capable of diving up to a depth of 4,500 meters. [25]

Ictineu 3

Ictineu 3 inside a warehouse in Sant Feliu de Llobregat, Catalonia, Spain. Submari Ictineu 3 sencer.JPG
Ictineu 3 inside a warehouse in Sant Feliu de Llobregat, Catalonia, Spain.
Ictineu 3
a three-person crewed DSV. The hull is made of inox steel and it has a large 1,200-millimetre-diameter (47 in) semi-spheric acrylic glass viewport. It is designed to reach depths of 1,200 metres (3,900 ft), thus being the ninth-deepest submersible, and it is capable of diving during 10 hours using li-ion batteries. [26]

Matsya 6000

Matsya 6000 DSV
an Indian under-development crewed deep-submergence vehicle intended to be utilised for deep sea exploration of rare minerals in the Indian Ocean. It is capable of diving down to a depth of 6,000 m. First uncrewed trial was conducted on 27 October 2021 where the 'personnel sphere' was lowered to a depth of 600 m, off the coast of Chennai. [27] [28]

Titan

Titan

Titan, previously called Cyclops 2, was an experimental submersible that imploded while transporting tourists to visit the wreckage of the Titanic in 2023. The submersible was created and operated by OceanGate. It was the first privately-owned submersible with a claimed maximum depth of 4,000 m (13,000 ft), and the first completed crewed submersible with a hull constructed of titanium and carbon fiber composite materials.

After testing with dives to its maximum intended depth in 2018 and 2019, the original composite hull of Titan developed fatigue damage and was replaced by 2021. In that year, OceanGate began transporting paying customers to the wreck of the Titanic, completing several dives to the wreck site in 2021 and 2022.

On June 18, 2023, Titan imploded during a dive to the Titanic. All five occupants of the submersible were killed. OceanGate had lost contact with Titan and contacted authorities later that day after the submersible was overdue for return. A massive international search and rescue operation ensued and ended on June 22, when debris from Titan was discovered about 1,600 feet (500 metres) from the bow of the Titanic.

Other DSV bathyscaphes

Bathyscaphe Archimède
French-made bathyscaphe, operated around the time of the Trieste.
FNRS-4

Deepest explorers

  1. Flag of the United States.svg DSV Limiting Factor  –11,000 m [29]
  2. Flag of Switzerland (Pantone).svg Bathyscaphe Trieste  –11,000 m [30]
  3. Flag of Australia (converted).svg Deepsea Challenger  –11,000 m [31]
  4. Flag of the People's Republic of China.svg Fendouzhe  –11,000 m [32]
  5. Flag of France.svg Archimède  –9,500 m
  6. Flag of the People's Republic of China.svg Jiaolong  –7,000 m [33]
  7. Flag of Japan.svg DSV Shinkai 6500  –6,500 m
  8. Flag of Russia.svg Konsul  –6,500 m
  9. Flag of the United States.svg DSV Alvin  –6,500 m [34]
  10. Flag of the United States.svg DSV Sea Cliff  –6,000m [35]
  11. Flag of Russia.svg MIR  –6,000 m
  12. Flag of France.svg Nautile  –6,000 m

Related Research Articles

<i>Trieste</i> (bathyscaphe) Deep sea scientific submersible

Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe. In 1960, it became the first crewed vessel to reach the bottom of Challenger Deep in the Mariana Trench, the deepest point in Earth's seabed. The mission was the final goal for Project Nekton, a series of dives conducted by the United States Navy in the Pacific Ocean near Guam. The vessel was piloted by Swiss oceanographer Jacques Piccard and US Navy lieutenant Don Walsh. They reached a depth of about 10,916 metres (35,814 ft).

DSV <i>Alvin</i> Crewed deep-ocean research submersible

Alvin (DSV-2) is a crewed deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) of Woods Hole, Massachusetts. The original vehicle was built by General Mills' Electronics Group in Minneapolis, Minnesota. Named to honor the prime mover and creative inspiration for the vehicle, Allyn Vine, Alvin was commissioned on June 5, 1964.

<span class="mw-page-title-main">Bathyscaphe</span> Free-diving self-propelled deep-sea submersible

A bathyscaphe is a free-diving, self-propelled deep-sea submersible, consisting of a crew cabin similar to a Bathysphere, but suspended below a float rather than from a surface cable, as in the classic Bathysphere design.

<span class="mw-page-title-main">Submersible</span> Small watercraft able to navigate under water

A submersible is an underwater vehicle which needs to be transported and supported by a larger watercraft or platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent operation at sea.

<span class="mw-page-title-main">Midget submarine</span> Submarine under 150 tons

A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.

<span class="mw-page-title-main">Deep Submergence insignia</span> US Navy uniform badge

The Deep Submergence Insignia is a uniform breast pin worn by officers, both men and women of the United States Navy's submarine service who are qualified in submarines and have completed one year of regular assignment to a crewed or uncrewed deep submersible. The badge was first approved on 6 April 1981.

<i>Trieste II</i> (Bathyscaphe) US Navys second bathyscaphe

Trieste II(DSV-1) was the United States Navy's first bathyscaphe purchased from its Swiss designers, and the successor to Trieste.

<i>Mir</i> (submersible) Self-propelled deep submergence vehicle

Mir was a class of two self-propelled deep-submergence vehicles. The project was initially developed by the USSR Academy of Sciences along with Lazurit Central Design Bureau, and two vehicles were ordered from Finland. The Mir-1 and Mir-2, delivered in 1987, were designed and built by the Finnish company Rauma-Repola's Oceanics subsidiary. The project was carried out under the supervision of constructors and engineers of the Shirshov Institute of Oceanology.

DSV <i>Turtle</i> US Navy crewed deep-ocean research submersible

Turtle (DSV-3) was a 16-ton, crewed deep-ocean research submersible owned by the United States Navy. It is sister to Alvin (DSV-2) and Sea Cliff (DSV-4).

DSV-4 is a 25-ton, crewed deep-ocean research submersible owned by the United States Navy, now known only by its hull number, not by its former name.

<i>FNRS-2</i> First bathyscaphe

The FNRS-2 was the first bathyscaphe. It was created by Auguste Piccard. Work started in 1937 but was interrupted by World War II. The deep-diving submarine was finished in 1948. The bathyscaphe was named after the Belgian Fonds National de la Recherche Scientifique (FNRS), the funding organization for the venture. FNRS also funded the FNRS-1 which was a balloon that set a world altitude record, also built by Piccard. The FNRS-2 set world diving records, besting those of the bathyspheres, as no unwieldy cable was required for diving. It was in turn bested by a more refined version of itself, the bathyscaphe Trieste.

<i>FNRS-3</i> Bathyscaphe of the French Navy

The FNRS-3 or FNRS III is a bathyscaphe of the French Navy. It is currently preserved at Toulon. She set world depth records, competing against a more refined version of her design, the Trieste. The French Navy eventually replaced her with the bathyscaphe FNRS-4, in the 1960s.

<span class="mw-page-title-main">Deep-sea exploration</span> Investigation of ocean conditions beyond the continental shelf

Deep-sea exploration is the investigation of physical, chemical, and biological conditions on the ocean waters and sea bed beyond the continental shelf, for scientific or commercial purposes. Deep-sea exploration is an aspect of underwater exploration and is considered a relatively recent human activity compared to the other areas of geophysical research, as the deeper depths of the sea have been investigated only during comparatively recent years. The ocean depths still remain a largely unexplored part of the Earth, and form a relatively undiscovered domain.

<i>Archimède</i> French Navy bathyscaphe

The bathyscaphe Archimède is a deep diving research submersible of the French Navy. It used 42,000 US gallons (160,000 L) of hexane as the gasoline buoyancy of its float. It was designed by Pierre Willm and Georges Houot. In 1964, Archimède descended into "what was then thought to be the deepest part of the Puerto Rico Trench", which the NY Times reported as 27,500 feet (8,400 m).

DSV <i>Shinkai</i> Crewed research submersible

The Shinkai (しんかい) was a crewed research submersible that could dive up to a depth of 600 m. It was completed in 1970, and until 1981 it had the greatest depth range of any crewed research vehicle in Japan. The Shinkai is owned and run by the Japan Coast Guard and it is launched from the support vessel Otomemaru (乙女丸).

<i>Jiaolong</i> (submersible) Chinese crewed deep-sea research submersible

Jiaolong is a Chinese crewed deep-sea research submersible that can dive to a depth of over 7,000 metres (23,000 ft), developed from the Sea Pole-class bathyscaphe. It has the second-greatest depth range of any crewed research vehicle of the Chinese Navy; the only crewed expeditions to have gone deeper were the dives of the Trieste bathyscaphe in 1960, Archimède in 1962, Deepsea Challenger in 2012, and DSV Limiting Factor in 2019.

DSV-5 Nemo Submersible used by the United States Navy

DSV-5, ex-NEMO, was a submersible used by the United States Navy between 1970 and 1986 to oversee and observe undersea construction work. NEMO had a spherical transparent acrylic hull, which gave occupants panoramic vision. NEMO was the first submersible with a hull made entirely out of transparent acrylic (Plexiglass), and much of her career was spent testing this hull design. NEMO was found to be an effective observation platform, despite not being able to hover in place, and acrylic-hulled submersibles have continued to be built and operated in the United States. NEMO is considered part of the Alvin class of Deep Submergence Vehicles despite bearing little resemblance to the other subs of the class. NEMO was transferred to "other government agencies" in 1986 and retired from government service in 2011. It was then given to the U.S. Navy Seabee Museum, where it remains on display.

Deep Sea Warrior bathyscaphe is a type of very little known deep-submergence vehicle built in the People’s Republic of China (PRC). Deep Sea Warrier was handed over from its builder China Shipbuilding Industry Corporation to its customer at the end of 2016, but actual deep diving did not begun until end of the following year due to preparation needed, because it was such as new product that thorough preparation was needed to ensure its safe operation, and bathyscaphe is capable of diving to a depth of 4500 meters.

Striver (bathyscaphe) Chinese deep submergence vehicle

Striver bathyscaphe is a type of deep-submergence vehicle built in the People's Republic of China (PRC). It was built by China State Shipbuilding Corporation (CSSC). It can accommodate three crew members, and is designed to reach depths of more than 10,000 meters. Striver is equipped with two mechanical arms, seven underwater cameras, seven sonars, hydraulic drills, and other scientific devices. On 10 November 2020, the bottom of the Challenger Deep was reached by Striver with three Chinese scientists onboard whilst livestreaming the descent to a reported depth of 10,909 m (35,791 ft).

DSV <i>Limiting Factor</i> Crewed full ocean depth rated submersible

Limiting Factor, known as Bakunawa since its sale in 2022, is a crewed deep-submergence vehicle (DSV) manufactured by Triton Submarines and owned and operated since 2022 by Gabe Newell’s Inkfish ocean-exploration research organization. It currently holds the records for the deepest crewed dives in all five oceans. Limiting Factor was commissioned by Victor Vescovo for $37 million and operated by his marine research organization, Caladan Oceanic, between 2018-2022. It is commercially certified by DNV for dives to full ocean depth, and is operated by a pilot, with facilities for an observer.

References

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  2. ↑ "Trieste". History.navy.mil. Archived from the original on 2010-03-17. Retrieved 2012-03-27.
  3. ↑ "Trieste II". History.navy.mil. Archived from the original on 2004-03-08. Retrieved 2012-03-27.
  4. ↑ "No Name (DSV 1)". Nvr.navy.mil. 2009-09-14. Retrieved 2012-03-27.
  5. 1 2 "Turtle, Bathysphere (DSV-3), 1968, Hahn and Clay Co., Houston, Texas". Mariners' Museum and Park . 2022. Archived from the original on 18 September 2022. Retrieved 18 September 2022.
  6. ↑ "No Name (DSV 2)". Nvr.navy.mil. 1990-10-25. Retrieved 2012-03-27.
  7. ↑ "Alvin cleared to return to service". National Science Foundation. 2014. Archived from the original on 24 June 2023. Retrieved 24 June 2023.
  8. ↑ "Who is Alvin". Woods Hole Oceanographic Institution. 2022. Archived from the original on 25 March 2023. Retrieved 23 June 2023.
  9. ↑ "No Name (DSV 3)". Nvr.navy.mil. Retrieved 2012-03-27.
  10. ↑ "No Name (DSV 4)". Nvr.navy.mil. Retrieved 2012-03-27.
  11. ↑ "No Name (DSV 5)". Nvr.navy.mil. Retrieved 2012-03-27.
  12. ↑ "NR 1 Deep Submergence Craft". Archived from the original on October 18, 2004.
  13. ↑ "Reynolds Aluminaut". Archived from the original on October 12, 2004.
  14. ↑ Dean 2018-12-21T17:15:00-05:00, Josh (21 December 2018). "An inside look at the first solo trip to the deepest point of the Atlantic". Popular Science. Retrieved 2018-12-29.{{cite web}}: CS1 maint: numeric names: authors list (link)
  15. ↑ "Explorer Makes History by Completing Five Deeps Expedition". 9 September 2019.
  16. ↑ "First dive to Titanic in 14 years shows wreck is deteriorating". BNO News. 2019-08-21.
  17. ↑ Written at Offshore Samar Island, Philippine Sea. "Submersible crew completes the world's deepest shipwreck dive in history (USS Johnston)" (PDF) (Press release). Dallas, Texas: Caladan Oceanic. 2021-03-21. Retrieved 2021-04-01.
  18. ↑ "Ледовый поход Лошарика" [The Losharik Ice Tour] (in Russian). 29 October 2012.
  19. ↑ Alexei Mikhailov; Vladimir Boloshin (29 October 2012). "Военный атомный батискаф "Лошарик" испытали в Арктике" [Military atomic bathyscaphe "Losharik" tested in the Arctic]. Izvestia (in Russian).
  20. ↑ "What makes Russia's new spy ship Yantar special?". BBC News. 2018-01-03. Retrieved 2021-03-14.
  21. ↑ "Submersible Consul tested: Voice of Russia". 2011-07-07. Archived from the original on 2012-09-08. Retrieved 2012-03-27.
  22. ↑ "Robot sub reaches deepest ocean". BBC News, 3 June 2009.
  23. ↑ 陈柳兵. "China's manned submersible Fendouzhe returns after ocean expedition". global.chinadaily.com.cn. Retrieved 2021-03-14.
  24. ↑ "Xi hails successful trials of submersible". chinadailyhk. Retrieved 2021-03-14.
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  26. ↑ Soro, Selena (11 May 2015). "L'Ictineu 3 lluita per sobreviure" [The Ictineu 3 fight to survive] (in Catalan). Ara . Retrieved 31 January 2016.
  27. ↑ "Samudrayaan Mission: India's first unique manned ocean mission – All you need to know". Jagran Josh . 30 October 2021. Retrieved 1 November 2021.
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  30. ↑ "DEEPSEA CHALLENGER Versus Trieste". 17 February 2012. Retrieved 23 June 2019.
  31. ↑ Amos, Jonathan (7 December 2011). "Oceans' deepest depth re-measured".
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  33. ↑ "Jiaolong [Dragon] deep-sea submersible". www.globalsecurity.org. Retrieved 2020-11-11.
  34. ↑ "Humans can dive deeper into the world's oceans than ever before with Alvin". CNN. 2022-10-14. Retrieved 2022-12-18.
  35. ↑ "Vessel Returns to Point Loma : Navy Vehicle Takes a Plunge to a Record Depth". Los Angeles Times. 1985-03-30. ISSN   0458-3035 . Retrieved 2019-06-27.

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