Editing DSV Alvin (section)

===2011 to 2014 rebuild===
After one last dive to assess damage to the [[Gulf of Mexico]]'s seafloor after the [[Deepwater Horizon oil spill|''Deepwater Horizon'' disaster]], ''Alvin'' was refitted further, starting January 2011.<ref>{{cite news |url= https://www.bbc.co.uk/news/science-environment-11938904 |title=Ocean science giant ''Alvin'' set for upgrade |first=Jonathan |last=Amos |publisher=[[BBC News]] |date=16 December 2010 |access-date=5 August 2012 }}</ref> Alvin began an extensive rebuild, which featured new cameras, lighting, and an enlarged titanium personnel sphere. This three-and-a-half-year effort to upgrade the vessel implemented the core infrastructure to eventually increase its depth capability from {{convert|4,500|meters|feet}} to {{convert|6,500|meters|feet}}.<ref name="2022_seatrials">{{cite web |url= https://www.whoi.edu/oceanus/feature/who-is-alvin-and-what-are-sea-trials |title=Who is Alvin |publisher=Woods Hole Oceanographic Institution |year=2022 |access-date=23 June 2023 |url-status=live |archive-url=https://web.archive.org/web/20230325014149/https://www.whoi.edu/oceanus/feature/who-is-alvin-and-what-are-sea-trials/ |archive-date=25 March 2023}}</ref> In 2014, an extensively refitted ''Alvin'' conducted verification testing in the Gulf of Mexico, and was certified to return to service. <ref>{{cite web |url= http://alvinverification.whoi.edu/not-your-grandfathers-cadillac/ |title=Not Your Grandfather's Cadillac |first=Lonny |last=Lippsett |date=13 March 2014 |publisher=[[Woods Hole Oceanographic Institution]] |access-date=18 March 2014}}</ref><ref name="2014 retrun">{{cite web |url= https://www.nsf.gov/news/news_summ.jsp?cntn_id=130226&org=NSF |title=Alvin cleared to return to service |publisher=National Science Foundation |year=2014 |access-date=24 June 2023 |url-status=live |archive-url=https://web.archive.org/web/20230624061518/https://www.nsf.gov/news/news_summ.jsp?cntn_id=130226&org=NSF |archive-date=24 June 2023}}</ref> In March and April 2014, ''Alvin'' was used to explore the site of the 2010 Deepwater Horizon oil spill.<ref>{{Citation
 | last =Juhasz
 | first = Antonia 
 | author-link = Antonia Juhasz
 | title = The Deepwater Horizon Spill, Four Years On
 | magazine = Harper's
 | date = 2014-04-01
 | url = http://harpers.org/blog/2014/04/the-deepwater-horizon-spill-four-years-on/
}}</ref>