View source for RV Marcus G. Langseth

{{Short description|American research vessel}}
{|{{Infobox ship begin}}
{{Infobox ship image
| Ship image               = LDEO Langseth.jpg
| Ship caption             = RV ''Marcus G. Langseth'', operated by the Lamont–Doherty Earth Observatory
}}
{{Infobox ship career
| Hide header              =
| Ship name                =
| Ship owner               = [[National Science Foundation]]
| Ship operator            = [[Columbia University]], [[Lamont–Doherty Earth Observatory]]
| Ship registry            =
| Ship route               =
| Ship ordered             =
| Ship builder             = Ulstein (Norway)
| Ship original cost       =
| Ship yard number         =
| Ship way number          =
| Ship laid down           =
| Ship launched            =15 June 1991
| Ship completed           = 1991
| Ship christened          =
| Ship acquired            = 2004
| Ship maiden voyage       =
| Ship in service          =
| Ship out of service      =
| Ship identification      = *{{IMO Number|9010137}}
*{{MMSI Number|367059880}}
*[[Maritime call sign|Callsign]]: WDC6698
| Ship fate                =
| Ship status              = Active
| Ship notes               = Originally constructed as a seismic vessel the ''Marcus G. Langseth'' was modified and outfitted to perform the tasks required of a general purpose research vessel.
}}
{{Infobox ship characteristics
| Hide header              =
| Header caption           =
| Ship class               =
| Ship tonnage             = {{GT|3834}}
| Ship displacement        = 2578.4
| Ship length              = {{cvt|71.5|m|ftin}}
| Ship beam                = {{cvt|17.0|m|ftin}}
| Ship height              =
| Ship draught             =
| Ship draft               = {{cvt|5.9|m|ftin}}
| Ship depth               =
| Ship decks               =
| Ship deck clearance      =
| Ship ramps               =
| Ship ice class           = Baltic IA
| Ship sail plan           =
| Ship power               = 2 x shaft generators 1665 KVA each
| Ship propulsion          = 2 x Bergen BRG-6 2650 kW/3550 hp (each); 1 x Tunnel 590 kW/800 hp bow thruster
| Ship speed               = {{convert|13|kn|lk=in}} max
| Ship capacity            =
| Ship crew                = 20 crew, 35 scientific
| Ship notes               =
}}
|}

'''RV ''Marcus Langseth''''' is a [[research vessel]] operated by the [[Lamont–Doherty Earth Observatory]] (LDEO) of [[Columbia University]] as a part of the University-National Oceanographic Laboratory System (UNOLS) fleet.<ref>{{cite news |url=http://www.unols.org/info/vessels.htm |title=University-National Oceanographic Laboratory System: UNOLS Vessels | publisher=[[University-National Oceanographic Laboratory System]] |url-status=dead |archive-url=https://web.archive.org/web/20110929015616/http://www.unols.org/info/vessels.htm |archive-date=2011-09-29}}</ref><ref>{{cite news|url=http://www.ldeo.columbia.edu/res/fac/oma/langseth/index.html |title=Lamont–Doherty Earth Observatory: R/V Marcus G. Langseth| url-status=live |archive-url=https://web.archive.org/web/20110709075041/http://www.ldeo.columbia.edu/res/fac/oma/langseth/index.html |archive-date=2011-07-09}}</ref> The ''Marcus G. Langseth'' was dedicated on December 4, 2007, came into service in early 2008, replacing the {{RV|Maurice Ewing}}.<ref name=ScienceDaily2007-12-04>{{cite news|url= http://www.sciencedaily.com/releases/2007/12/071204180534.htm|title= New Seismic Vessel Will Look Deep Under Oceans |publisher=[[Science Daily]]|date= 2007-12-04 |accessdate=2011-11-02 |quote= The academic community's most advanced seismic-research vessel was dedicated here today, opening potential new windows on natural hazards, earth's evolution, and other vital questions. The R/V ''Marcus G. Langseth'', owned by the U.S. National Science Foundation, will generate CAT-scan-like 3D images of magma chambers, faults and other structures miles below the world's seabeds. To be used by dozens of cooperating institutions, it will be operated for NSF by Columbia University's Lamont–Doherty Earth Observatory.|url-status=live|archive-url=https://web.archive.org/web/20140713213930/http://www.sciencedaily.com/releases/2007/12/071204180534.htm|archive-date = 2014-07-13}}</ref>

''Marcus G. Langseth'' is intended primarily to collect [[reflection seismology|multichannel seismic]] data, including 3-D surveys.  The ship was purchased from the geophysical survey company [[WesternGeco]] in 2004, having previously been named ''Western Legend''.{{citation needed|date=July 2024}} The ''Marcus G. Langseth'' was named for [[Marcus G. Langseth]], a Lamont scientist.{{citation needed|date=July 2024}}

In March 2009 Chinese authorities denied the vessel permission to pass between [[Taiwan]] and China.<ref>{{cite news |url= http://www.nature.com/news/2009/090331/full/news.2009.216.html |title = China denies US ship access to Taiwan Strait |publisher   = [[Nature News]] |date= 2009-03-31 |access-date= 2011-11-02 |quote= The research vessel ''Marcus G. Langseth'' will have to steer clear of the waters that separate Taiwan from mainland China, after the Chinese government denied the US seismic research vessel permission to sail in the area. |first= Jane |last=Qiu |author-link=Jane Qiu |url-status= live |archive-url=https://web.archive.org/web/20120114083841/http://www.nature.com/news/2009/090331/full/news.2009.216.html |archive-date = 2012-01-14}}</ref> In August 2009, ''Marcus G. Langseth'' was named in a Canadian lawsuit seeking to halt its seismic tomography experiment.<ref>{{cite news |url         = http://www.ens-newswire.com/ens/aug2009/2009-08-13-01.asp |title       = Lawsuit Seeks to Halt U.S. Blasts in Canadian Marine Protected Area
 |publisher   = [[Environmental News Service]] |date        = 2009-08-13 |accessdate  = 2011-11-02 |quote       = Two environmental groups are taking the Canadian government to court to stop loud seismic blasting by an American research vessel that threatens endangered and threatened whales in a Canadian marine protected area.  U.S. researchers have asked Canada to grant a controversial seismic vessel access to the Endeavour Hydrothermal Vents, a marine protected area 250 kilometers (155 miles) off British Columbia's coast and a habitat of endangered blue whales, threatened fin whales, and other marine life. |url-status     = live |archiveurl  = https://web.archive.org/web/20110628223418/http://www.ens-newswire.com/ens/aug2009/2009-08-13-01.asp |archivedate = 2011-06-28}}</ref> The lawsuit was dismissed, diplomatic clearance was issued and the ship sailed after a delay of a day.<ref>{{cite news| url        =http://gore.ocean.washington.edu/research/etomo_evironmentalists_091809.pdf| title        =The Campaign Against the Endeavour Tomography Study – A "Moral Victory" for Canadian Environmental Groups?| accessdate        =2011-11-02| author        =William Wilcock| url-status        =dead| archiveurl        =https://web.archive.org/web/20110817095819/http://gore.ocean.washington.edu/research/etomo_evironmentalists_091809.pdf| archivedate        =2011-08-17}}

</ref><ref>
{{cite news
 |url         = http://www.canada.com/vancouversun/news/westcoastnews/story.html?id=463d3872-48e6-47ea-af21-faf8234e79e5
 |title       = Federal court will not stop U.S. seismic testing in whale habitat off B.C. coast: The Federal Court of Canada on Thursday dismissed a request by environmental groups for a stay of the federal government's authorization of U.S. seismic surveys off the B.C. coast
 |publisher   = [[Canada.com]]
 |date        = 2009-08-28
 |accessdate  = 2011-11-02
 |quote       = Justice Michael Kelen said he was not satisfied that the surveys would harm marine life based on new federal requirements imposed since the legal action was launched.
 |url-status     = dead
 |archiveurl  = https://web.archive.org/web/20160324104021/http://www.canada.com/vancouversun/news/westcoastnews/story.html?id=463d3872-48e6-47ea-af21-faf8234e79e5
 |archivedate = 2016-03-24
}}

</ref>

==References==

{{Reflist}}

== External links ==
* [http://www.ldeo.columbia.edu Lamont–Doherty Earth Observatory]
* [https://lamont.columbia.edu/research-divisions/marine-large-programs/office-marine-operations/langseth LDEO marine operations: R/V ''Marcus G. Langseth'' Specifications]


{{-}}{{Columbia University}}{{UNOLS Vessels Navbox}}

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[[Category:Research vessels of the United States]]
[[Category:University-National Oceanographic Laboratory System research vessels]]
[[Category:1991 ships]]
[[Category:Columbia University]]
[[Category:Lamont-Doherty Earth Observatory]]


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