Editing Deep-submergence vehicle (section)

===Kalitka-class DSVN===
; [[Russian submarine Losharik|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 [[Multi-spherical hull|consisting of several conjoined spheres]] and able to withstand tremendous pressure — during the 2012 research mission it routinely dove to {{convert|2500|to|3000|m|mi}},<ref>{{cite web|url=http://www.lenta.ru/articles/2012/10/29/losharik/|title=Ледовый поход Лошарика|trans-title=The Losharik Ice Tour|language=ru|date=29 October 2012}}</ref><ref>{{cite news|url=http://izvestia.ru/news/538268|title=Военный атомный батискаф "Лошарик" испытали в Арктике|trans-title=Military atomic bathyscaphe "Losharik" tested in the Arctic|author1=Alexei Mikhailov|author2=Vladimir Boloshin|date=29 October 2012|newspaper=[[Izvestia]]|language=ru}}</ref> with maximum depth being said to be approximately {{convert|6000|m|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.