What is Centreboard?
[[File:Centerboard (PSF).svg|thumb|280px]] A '''centreboard''' or '''centerboard''' (US) is a boat [[Hull_(watercraft)#Appendages|hull appendage]] which can be put up and down in the water.<ref name = ERS2021>{{cite web | title = The Equipment Rules of Sailing for 2021-2024 | publisher = World Sailing (UK) Ltd. | url = https://www.sailing.org/tools/documents/EquipmentRulesofSailing20212024-[26661].pdf | access-date = 2022-10-14}}, Section E.1.2 Hull Appendage Types</ref> It is used in [[dinghy sailing|dinghies]] and by other sailing boats in shallow water but in deep water it gives the boat [[stability]].<ref>{{cite web|url=http://www.brayyachtdesign.bc.ca/Stability.pdf|title=Stability- what it is and how does it work?}} Bray Yacht Design. retrieved July 17 2019</ref><ref>{{cite web|url=https://www.nwemail.co.uk/news/17734776.safety-failing-led-to-disabled-man-drowning-on-sailing-trip/|title=Safety failing led to disabled man drowning on sailing trip}} Amy Fenton, The Mail. June 28 2019</ref> ==History== The centerboard was invented by Lt. John Schank (c. 1740 – 6 February 1823). He was an [[officer]] of the British [[Royal Navy]]. ==Design== A centerboard can be made from wood, plastic or metal. On small boats today they are usually made from a type of plastic or [[fibreglass]]. On bigger boats, they can be made from metal and are also very heavy to help the boat to sail. Some centerboards are on a type of [[hinge]] and they swing up and down. Other centerboards just push straight down and are called daggerboards. On bigger boats, they are used to allow them to cruise in shallow water in bays or rivers. ==References== {{reflist}} [[Category:Sailing]] [[Category:Ship building]]