Editing James Cook (section)

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[[File:Larcum Kendall chronometer K1.jpg|thumb
|alt=A large pocket watch, about 13 centimeters in diameter
|The [[Larcum_Kendall#K1|K1 chronometer]] used on Cook's second and third voyages, which enabled accurate computation of longitude. The cost was £500, {{Inflation|UK|500|1769|fmt=eq|cursign=£}}.<ref>
{{cite book
   | title = Marine Chronometers at Greenwich: A Catalogue of Marine Chronometers at the National Maritime Museum, Greenwich
  | last= Betts
  | first= J.
 |  isbn=9780191511172
  | url=https://books.google.com/books?id=xL9EDwAAQBAJ
  | year=2018
  | publisher=OUP Oxford
 | page = 186
}} The British government paid Kendall £450 plus a £50 bonus.
</ref>]]
Cook's three voyages to the Pacific Ocean vastly expanded Europeans' knowledge of the area. Several islands, including the Hawaiian group, were encountered for the first time by Europeans, and his accurate navigational charting of large areas of the Pacific contributed to the fields of hydrographic and geographic knowledge.{{cn|date=May 2025}}

On his second and third voyages, Cook carried the K1 chronometer made by [[Larcum Kendall]], to test if it could accurately keep time for long spans of time, while withstanding the violent motions of a ship. It performed well, and thus (along with similar chronometers, such as [[John_Harrison#H4|John Harrison's H4]]) solved the [[History of longitude|longitude problem]] that had plagued mariners for centuries.{{sfn|Hough|1994| pp= 192-193, 197, 236}}{{sfn|Collingridge|2003|pp=260, 309, 344}}<ref>{{cite web |url=http://dl.nfsa.gov.au/module/1318/ |title=Captain Cook – Cook's Chronometer |work=English and Media Literacy, Documentaries |via=dl.nfsa.gov.au |year=2011 |access-date=8 August 2011 |archive-date=20 February 2011 |archive-url=https://web.archive.org/web/20110220205340/http://dl.nfsa.gov.au/module/1318/ |url-status=live}}</ref>{{efn|
Kendall's chronometer was a copy of Harrison's H4 chronometer.
{{sfn|Hough|1994| pp= 192-193, 197, 236}}
}} Cook's log was full of praise for the timepiece.{{cn|date=June 2025}}