Editing Trolling (fishing) (section)

===Downrigger===
[[Downrigger]] are devices used while trolling to keep a bait or lure at the desired depth. In practice, fish swim at different depths according to factors such as the temperature and amount of light in the water, and the speed and direction of water currents.<ref name=Moritz>Moritz AJL [http://www.google.co.nz/patents?hl=en&lr=&vid=USPAT3897648&id=_kc2AAAAEBAJ&oi=fnd&dq=troll|trolling+fish|fishing&printsec=abstract#v=onepage&q=troll|trolling%20fish|fishing&f=false Trolling line sinkers] {{Webarchive|url=https://web.archive.org/web/20110926210122/http://www.google.co.nz/patents?hl=en&lr=&vid=USPAT3897648&id=_kc2AAAAEBAJ&oi=fnd&dq=troll%7Ctrolling+fish%7Cfishing&printsec=abstract#v=onepage&q=troll%7Ctrolling%20fish%7Cfishing&f=false |date=26 September 2011 }} Patent number: 2645053, Issued: July 1953.</ref> A downrigger consists of a one or two metre horizontal pole which supports a weight, typically about {{cvt|3|kg}} of lead, on a steel cable. A clip called a "line release" attaches the fishing line to the weight, and the bait or lure is attached to the release. The fishing line is reeled in by a spool powered either by manual cranking or by an electric motor.<ref>Schultz 2009, pp. 219–220.</ref> Using a downrigger can be hazardous. For example, man-made reservoirs can contain submerged trees and other structures beneath the surface which downriggers can snag.{{Citation needed|date=March 2021}}