# How many miles to circumnavigate the Earth by boat?

**URL:** <https://boards.straightdope.com/t/how-many-miles-to-circumnavigate-the-earth-by-boat/615387>\
**Category:** Factual Questions\
**Created:** [March 10, 2012, 4:45pm UTC](https://boards.straightdope.com/t/how-many-miles-to-circumnavigate-the-earth-by-boat/615387 "2012-03-10T16:45:45Z")\
**Posts on this page:** 1\
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**Author:** ![Chronos](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/chronos/32/134_2.png) [@Chronos](https://boards.straightdope.com/u/Chronos)\
**Post date:** [March 11, 2012, 5:29am UTC](https://boards.straightdope.com/t/how-many-miles-to-circumnavigate-the-earth-by-boat/615387/11 "2012-03-11T05:29:58Z")

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> [@](#):
>
> How about:  
> A voyage is a proper circumnavigation if it intersects every great circle.

I think this is equivalent to my criterion, which is that at least one pair of points on the route be antipodal to each other.

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