Editing Daggerboard (section)

===Purpose===
The purpose of the daggerboard (or any keel) is to balance the force of the wind on the sails. Without a daggerboard or keel, a sailboat could not sail up-wind and would simply be blown sideways.<ref name="Hankinson">Hankinson, K. (1973). Rigging small sailboats. Bellflower, Calif.: Glen-L. Keel daggerboard rudder. (n.d.). Retrieved March 22, 2015, from http://www.mecaflux.com/en/keel{{Dead link|date=July 2019 |bot=InternetArchiveBot |fix-attempted=yes }} daggerboard rudder.htm</ref> 

During a storm, daggerboards can help reduce the tendency of a small boat to tip over ("breach") due to waves. A catamaran in a storm would lift the [[leeward]] hull daggerboard and fully extend the upwind daggerboard.{{Citation needed|date=January 2020|reason=Conventional wisdom, but is there any research on the topic?}} If there is no wind and an outboard motor is being used, lifting the daggerboards will ensure the least drag.<ref>Multihull Keels and Daggerboards | Catamaran Dealer. (2009, March 12). Retrieved April 8, 2015, from http://www.aeroyacht.com/2009/03/12/multihull-keels-and-daggerboards/ {{Webarchive|url=https://web.archive.org/web/20150103224025/http://www.aeroyacht.com/2009/03/12/multihull-keels-and-daggerboards/ |date=2015-01-03 }})</ref>

When a small sailboat flips on its side, the keel can also be used to right the boat. Standing on the keel gives the sailor additional leverage to roll the hull upright. The centerboard, daggerboard, or bilgeboard can be used as a platform upon which to stand, providing increased [[Mechanical advantage|leverage]], in the event the [[Dinghy sailing|dinghy]] overturns via a [[Capsizing|capsize]] or [[Turtling (sailing)|turtle]].