I have a newfound appreciation for your sextant.
I would actually like to learn how to use one.
I saw a show on PBS recently about a Shackleton attempt to cross Antarctica in 1914, and the show (unlike the Wikipedia entry) credited
Captain Frank Worsley with the fact not a single man was lost during the three year voyage after their ship the Endurance was caught in ice and sank.
In part of the saga, the three boats land on a dot of rocks and ice "Elephant Island", where most of the men were left to make do, while five, led by Worsley set out in the one remaining ocean worthy boat, and using sextant with infrequent sightings because of weather, managed to guide the boat 800 miles across the stormy South Atlantic and reach South Georgia Island.