Deep-submergence vehicle explained

A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. 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. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.

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. 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.
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 6000feet 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 6000feet; rebuilt in 1973 to 4500m (14,800feet). 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 6500m (21,300feet) 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 : Alvins 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 6000m (20,000feet),[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

    See main article: DSV Limiting Factor. 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, sunk on October 25, 1944, in the Battle off Samar (in the Philippine Sea off Samar Island). Johnston lies at depth of, making Limiting Factors 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 1000m (3,000feet). 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 6000m (20,000feet). 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 2500mto3000mm (8,200feetto10,000feetm),[18] [19] with maximum depth being said to be approximately 6000m (20,000feet). 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 Mirs, 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 6270m (20,570feet).[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 6000m (20,000feet).

    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 6500m (21,300feet) with three crew members. JAMSTEC was operating a ROV called Kaikō, which was able to submerge to 11000m (36,000feet), but was lost at sea in May 2003.

    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 2000m (7,000feet) 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.

    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.[22] 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.[23]

    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.[24]

    Ictineu 3

    Ictineu 3 : a three-person crewed DSV. The hull is made of inox steel and it has a large 1200adj=midNaNadj=mid semi-spheric acrylic glass viewport. It is designed to reach depths of 1200m (3,900feet), thus being the ninth-deepest submersible, and it is capable of diving during 10 hours using li-ion batteries.[25]

    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.[26] [27]

    Titan

    TitanTitan, 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. 11,000 m[28]
    2. 11,000 m[29]
    3. Deepsea Challenger11,000 m[30]
    4. Fendouzhe11,000 m[31]
    5. Archimède9,500 m
    6. Jiaolong7,000 m[32]
    7. 6,500 m
    8. Konsul6,500 m
    9. 6,500 m[33]
    10. 6,000m[34]
    11. 6,000 m
    12. Nautile6,000 m

    External links

    Notes and References

    1. Book: Shenton, Edward H. . Diving for science . W. W. Norton & Company, Inc. . 1972 . 0-393-06380-1 . New York.
    2. Web site: Trieste . History.navy.mil . 2012-03-27 . dead . https://web.archive.org/web/20100317120249/http://www.history.navy.mil/danfs/t8/trieste.htm . 2010-03-17 .
    3. Web site: Trieste II . https://web.archive.org/web/20040308155258/http://www.history.navy.mil/danfs/t8/trieste_ii.htm . dead . 2004-03-08 . History.navy.mil . 2012-03-27 .
    4. Web site: [{{Naval Vessel Register service craft URL|id=DSV1}} No Name (DSV 1) ]. Nvr.navy.mil . 2009-09-14 . 2012-03-27.
    5. Web site: Turtle, Bathysphere (DSV-3), 1968, Hahn and Clay Co., Houston, Texas . . 2022 . 18 September 2022 . live . https://web.archive.org/web/20220918093407/https://catalogs.marinersmuseum.org/object/CL28071 . 18 September 2022 .
    6. Web site: [{{Naval Vessel Register service craft URL|id=DSV2}} No Name (DSV 2) ]. Nvr.navy.mil . 1990-10-25 . 2012-03-27.
    7. Web site: Alvin cleared to return to service . National Science Foundation . 2014 . 24 June 2023 . live . https://web.archive.org/web/20230624061518/https://www.nsf.gov/news/news_summ.jsp?cntn_id=130226&org=NSF . 24 June 2023.
    8. Web site: Who is Alvin . Woods Hole Oceanographic Institution . 2022 . 23 June 2023 . live . https://web.archive.org/web/20230325014149/https://www.whoi.edu/oceanus/feature/who-is-alvin-and-what-are-sea-trials/ . 25 March 2023.
    9. Web site: [{{Naval Vessel Register service craft URL|id=DSV3}} No Name (DSV 3) ]. Nvr.navy.mil . 2012-03-27.
    10. Web site: [{{Naval Vessel Register service craft URL|id=DSV4}} No Name (DSV 4) ]. Nvr.navy.mil . 2012-03-27.
    11. Web site: [{{Naval Vessel Register service craft URL|id=DSV5}} No Name (DSV 5) ]. Nvr.navy.mil . 2012-03-27.
    12. Web site: NR 1 Deep Submergence Craft. https://web.archive.org/web/20041018011437/http://www.chinfo.navy.mil/navpalib/factfile/ships/ship-nr1.html. October 18, 2004.
    13. Web site: Reynolds Aluminaut. https://web.archive.org/web/20041012020755/http://www.smv.org/info/aluminautEX.htm. October 12, 2004.
    14. Web site: An inside look at the first solo trip to the deepest point of the Atlantic. Dean 2018-12-21T17:15:00-05:00. Josh. Popular Science. 21 December 2018. en. 2018-12-29.
    15. Web site: Explorer Makes History by Completing Five Deeps Expedition. 9 September 2019.
    16. Web site: First dive to Titanic in 14 years shows wreck is deteriorating. BNO News. 2019-08-21.
    17. . Submersible crew completes the world's deepest shipwreck dive in history (USS Johnston) . Offshore Samar Island, Philippine Sea . Dallas, Texas . Caladan Oceanic . 2021-03-21 . 2021-04-01.
    18. Web site: Ледовый поход Лошарика. The Losharik Ice Tour. ru. 29 October 2012.
    19. News: Военный атомный батискаф "Лошарик" испытали в Арктике. Military atomic bathyscaphe "Losharik" tested in the Arctic. Alexei Mikhailov. Vladimir Boloshin. 29 October 2012. Izvestia. ru.
    20. News: 2018-01-03. What makes Russia's new spy ship Yantar special?. en-GB. BBC News. 2021-03-14.
    21. Web site: Submersible Consul tested: Voice of Russia . 2011-07-07 . 2012-03-27 . https://web.archive.org/web/20120908172222/http://english.ruvr.ru/2011/07/07/52909574.html . 2012-09-08 . dead .
    22. Web site: 陈柳兵. China's manned submersible Fendouzhe returns after ocean expedition. 2021-03-14. global.chinadaily.com.cn.
    23. Web site: Xi hails successful trials of submersible. 2021-03-14. chinadailyhk.
    24. Web site: Science. Chinese Academy of. China's Manned Submersible Starts New Expedition Science & Technology News. 2020-11-11. ONT. 13 March 2020 .
    25. Web site: L'Ictineu 3 lluita per sobreviure . The Ictineu 3 fight to survive . ca . Soro . Selena . 11 May 2015 . Ara. 31 January 2016.
    26. Web site: Samudrayaan Mission: India's first unique manned ocean mission – All you need to know. Jagran Josh. 30 October 2021. 1 November 2021.
    27. Web site: Samudrayaan project for deep ocean exploration launched. . 30 October 2021 . 31 October 2021.
    28. News: Deepest Ever Submarine Dive Made by Five Deeps Expedition . 23 June 2019 . The Maritime Executive . 2019-05-14 . en.
    29. News: DEEPSEA CHALLENGER Versus Trieste . 23 June 2019 . 17 February 2012.
    30. News: Amos . Jonathan . Oceans' deepest depth re-measured . 7 December 2011.
    31. Web site: Ben Westcott. China breaks national record for Mariana Trench manned-dive amid race for deep sea resources. 2020-11-11. CNN. 11 November 2020 .
    32. Web site: Jiaolong [Dragon] deep-sea submersible]. 2020-11-11. www.globalsecurity.org.
    33. News: Humans can dive deeper into the world's oceans than ever before with Alvin. 2022-10-14. CNN. 2022-12-18. en-US.
    34. News: Vessel Returns to Point Loma : Navy Vehicle Takes a Plunge to a Record Depth. 1985-03-30. Los Angeles Times. 2019-06-27. en-US. 0458-3035.

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