Editing Trolling (fishing) (section)

===Paravanes===
"Paravanes" (underwater kites) are sometimes used as depth controlling devices,<ref>Larson W [http://www.google.co.nz/patents?hl=en&lr=&vid=USPAT4486970&id=82wzAAAAEBAJ&oi=fnd&dq=troll|trolling+fish|fishing&printsec=abstract#v=onepage&q=troll|trolling%20fish|fishing&f=false Trolling depth controller] {{Webarchive|url=https://web.archive.org/web/20110926210126/http://www.google.co.nz/patents?hl=en&lr=&vid=USPAT4486970&id=82wzAAAAEBAJ&oi=fnd&dq=troll%7Ctrolling+fish%7Cfishing&printsec=abstract#v=onepage&q=troll%7Ctrolling%20fish%7Cfishing&f=false |date=26 September 2011 }} Patent number 4486970, issued 11 December 1984.</ref> particularly in commercial tuna fishing operations. These kites have various shapes, such as arrowhead paravanes, flexi-wing paravanes, and bi-wing paravanes.<ref name="fishing">{{cite web|url=http://www.fishing.sh/htmfiles/seabirds/danielsolander.html |title=Tuna Fishing an Underwater Bait Setting Device |publisher= | website= fishing.sh| access-date= 2015-08-31}}</ref> The devices can place the lure or bait at designated depths and positions; and in this way multiple devices can be towed at the same time without the devices and bait interfering with each other.<ref name="google">{{cite web|url= https://patents.google.com/patent/US2914884 |title=Patent US2914884 - Trolling device | publisher= | via=Google Patents |access-date=2015-08-31}}</ref>