Editing Multihull (section)

===Four and five hulls===

Some multihulls with four (quadrimaran) or five (pentamaran) hulls have been proposed; few have been built.<ref name="qf">{{cite journal|journal=Sage|title=Quadrimaran Ferries - High Speed with Shallow Draft|author=William Hockberger|publisher=Transportation Research Board Annual Meeting|year=2007|doi=10.3141/2033-01|s2cid=109720261}}</ref>  In 2018 a Swiss entrepreneur sought funding<ref>{{Cite web|url=http://www.yacht.de/aktuell/panorama/ein-quadrimaran-fuer-saubere-meere/a116062.html|title=Ein Quadrimaran für saubere Meere|last=Müller|first=Kristina|date=January 3, 2018|website=Yacht Magazin|language=de|access-date=2019-03-22|archive-date=2019-03-22|archive-url=https://web.archive.org/web/20190322151011/https://www.yacht.de/aktuell/panorama/ein-quadrimaran-fuer-saubere-meere/a116062.html|url-status=dead}}</ref> to build a sail-driven quadrimaran called ''Manta'' that would use solar power to scoop plastic from the ocean.<ref>{{Cite web|url=https://www.blick.ch/news/schweiz/erfindungen-mit-einem-quadrimaran-will-ein-schweizer-plastik-aus-dem-meer-holen-id8240306.html|title=Mit einem Quadrimaran will Schweizer Plastik aus Meer holen|last=Staff|date=2018-04-11|website=Blick|language=de|access-date=2019-03-22|archive-date=2019-03-22|archive-url=https://web.archive.org/web/20190322151000/https://www.blick.ch/news/schweiz/erfindungen-mit-einem-quadrimaran-will-ein-schweizer-plastik-aus-dem-meer-holen-id8240306.html|url-status=live}}</ref> ''Manta'' was still under development as of the end of 2023.<ref>{{Cite web |title=The SeaCleaners {{!}} The SeaCleaners in action: retrospective 2023 |url=https://www.theseacleaners.org/news/the-seacleaners-in-action-retrospective-2023/ |access-date=2024-02-01 |website=The SeaCleaners |language=en-GB |archive-date=2024-02-01 |archive-url=https://web.archive.org/web/20240201081345/https://www.theseacleaners.org/news/the-seacleaners-in-action-retrospective-2023/ |url-status=live }}</ref> A French manufacturer, Tera-4,  produces motor quadrimarans which use aerodynamic lift between the four hulls to promote planing and reduce power consumption.<ref>{{Cite web|url=http://www.actunautique.com/2017/04/tera-4-signe-la-vente-de-son-tout-premier-quadrimaran.html|title=Tera-4 signe la vente de son tout premier quadrimaran|date=April 10, 2017|website=ActuNautique.com|language=fr|access-date=2019-03-22|archive-date=2019-03-22|archive-url=https://web.archive.org/web/20190322151003/http://www.actunautique.com/2017/04/tera-4-signe-la-vente-de-son-tout-premier-quadrimaran.html|url-status=live}}</ref>

Design concepts for vessels with two pair of outriggers have been referred to as pentamarans. The design concept comprises a narrow, long hull that cuts through waves. The outriggers then provide the stability that such a narrow hull needs. While the aft sponsons act as trimaran sponsons do, the front sponsons do not touch the water normally; only if the ship rolls to one side do they provide added buoyancy to correct the roll.<ref>{{Cite web|url=http://www.marinetalk.com/articles-marine-companies/art/Five-Hulls-Make-Ships-Faster-64639T.html|title=Five Hulls Make Ships Faster|date=June 21, 1999|website=marinetalk.com|access-date=2019-03-09|archive-date=2018-12-25|archive-url=https://web.archive.org/web/20181225125613/http://www.marinetalk.com/articles-marine-companies/art/Five-Hulls-Make-Ships-Faster-64639T.html|url-status=usurped}}</ref><ref>{{Cite news|url=http://news.bbc.co.uk/2/hi/science/nature/1703904.stm|title=In the ocean fast lane|date=December 11, 2001|work=BBC News|access-date=2019-03-09|language=en-GB|archive-date=2019-03-22|archive-url=https://web.archive.org/web/20190322115813/http://news.bbc.co.uk/2/hi/science/nature/1703904.stm|url-status=live}}</ref> [[BMT Limited|BMT Group]], a shipbuilding and engineering company in the [[United Kingdom|UK]], has proposed a fast [[cargo ship]] and a [[yacht]] using this kind of hull.<ref>{{Cite web|url=https://newatlas.com/project-veloce-130-metre-40-knot-pentamaran-super-yacht/9934/|title=Project Veloce - 130 metre 40 knot Pentamaran Super Yacht|last=Martin|first=Jack|date=September 4, 2008|website=newatlas.com|language=en|access-date=2019-03-09|archive-date=2019-02-20|archive-url=https://web.archive.org/web/20190220062819/https://newatlas.com/project-veloce-130-metre-40-knot-pentamaran-super-yacht/9934/|url-status=live}}</ref><ref>{{Cite news|url=http://news.bbc.co.uk/2/hi/technology/4503686.stm|title=Ships power into faster future|date=December 7, 2005|work=BBC News|access-date=2019-03-09|language=en-GB|archive-date=2019-02-25|archive-url=https://web.archive.org/web/20190225063754/http://news.bbc.co.uk/2/hi/technology/4503686.stm|url-status=live}}</ref>