Good on ya, then. It sounds crazy, sailors in Coleridge’s day had a FAR better idea than you, as do I merely from surfing.
Water, water, every where,
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink
- Samuel Taylor Coleridge
Mind you, IF I was ever marooned like sailors back then, I would make a damn good attempt at distilling seawater, over a campfire, the steam would become fresh water.