Editing Great white shark (section)

=== Attacks on boats ===
Great white sharks infrequently bite and sometimes even sink boats. Only five of the 108 authenticated unprovoked shark bite incidents reported from the Pacific Coast during the 20th century involved [[kayak]]ers.<ref>{{cite web |url=http://www.sharkresearchcommittee.com/unprovoked_kayaker.htm |title=Unprovoked White Shark Attacks on Kayakers |publisher=Shark Research Committee |access-date=14 September 2008 |archive-date=20 July 2018 |archive-url=https://web.archive.org/web/20180720031600/http://www.sharkresearchcommittee.com/unprovoked_kayaker.htm |url-status=live}}</ref> In a few cases they have bitten boats up to {{cvt|10|m}} in length. They have bumped or knocked people overboard, usually biting the boat from the stern. In one case in 1936, a large shark leapt completely into the [[South Africa]]n fishing boat ''Lucky Jim'', knocking a crewman into the sea. Tricas and McCosker's underwater observations suggest that sharks are attracted to boats by the electrical fields they generate, which are picked up by the ampullae of Lorenzini and confuse the shark about whether or not wounded prey might be nearby.<ref>{{cite journal |last1=Tricas |first1=Timothy C. |last2=McCosker |first2=John E. |title=Predatory Behaviour of the White Shark (''Carcharodon carcharias''), with Notes on its Biology |year=1984 |journal=Proceedings of the California Academy of Sciences |volume=43 |issue=14 |pages=221–238 |url=http://www.hawaii.edu/fishlab/pubs/Tricas%20&%20McCosker%201984.pdf |archive-url=https://web.archive.org/web/20080907163257/http://www.hawaii.edu/fishlab/pubs/Tricas%20&%20McCosker%201984.pdf |archive-date=7 September 2008 |url-status=live}}</ref>