# Harrison's Marine Chronometer — WHE Article Discussion

**URL:** <https://community.worldhistory.org/t/harrisons-marine-chronometer-whe-article-discussion/414>\
**Category:** WHE Articles\
**Created:** [March 14, 2023, 9:58am UTC](https://community.worldhistory.org/t/harrisons-marine-chronometer-whe-article-discussion/414 "2023-03-14T09:58:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![markzcartwright](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/markzcartwright/32/35_2.png) [@markzcartwright](https://community.worldhistory.org/u/markzcartwright)\
**Post date:** [March 14, 2023, 9:58am UTC](https://community.worldhistory.org/t/harrisons-marine-chronometer-whe-article-discussion/414/1 "2023-03-14T09:58:56Z")

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John Harrison (1693-1776) invented an accurate marine chronometer after several decades of research and development. While the pendulum clock had already been invented in the 17th century, a clock that could withstand the vagaries of the sea, humidity, and air temperature remained an elusive dream. Harrison's last watch, the H5 of 1770, was so accurate that mariners could finally measure their longitude wherever they were at sea.

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_This is a companion discussion topic for the original content at [https://www.worldhistory.org/article/2197/harrisons-marine-chronometer/](https://www.worldhistory.org/article/2197/harrisons-marine-chronometer/)._

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**Author:** ![markzcartwright](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/markzcartwright/32/35_2.png) [@markzcartwright](https://community.worldhistory.org/u/markzcartwright)\
**Post date:** [July 28, 2026, 5:07pm UTC](https://community.worldhistory.org/t/harrisons-marine-chronometer-whe-article-discussion/414/2 "2026-07-28T17:07:22Z")

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