Thanks for the link Auzzee, the guy is still blogging ... and I learned a new Bad Word from his last post!
Me and my boat are much too simple to ever be able to power a watermaker. I've designed a shade awning that collects rainwater, and of course there's the mainsail trick. Most places I've lived the rain hasn't been very clean - various amounts of pollution, pollen and dust - so I designed a way to run the rainwater through a sediment filter at the deck fill. The paper filters get moldy, use the polysomething plastic ones.
Hopefully by next year I'll have time to start making prototypes for a solar still. I *love* my solar oven, but the design is such that it can't be used if the boat is doing more than a gentle rocking, so I'll design and build one that can be used at anchor and maybe underway. The solar still and solar oven design experiments are directly related, it would be great if the oven could somehow be used to distill water, but I think it will be too small. I expect the gimbal mechanism to be the same though. (however gimble is spelled, spell check doesn't know either