What Is The Longest Straight Line You Can Sail On Planet Earth Without "Bumping Into" Land?

What Is The Longest Straight Line You Can Sail On Planet Earth Without "Bumping Into" Land?

https://www.reddit.com/r/MapPorn/comments/15mwai/the_longest_straight_line_you_can_sail_almost/

And for those of you who say, "But that's not a straight line!!!"... here's a handy video I made in google earth.