Catching rain water while at sea never quite works as planned. WILDFLOWER had a simple system with barbed drains in the folds between reefs to attach a hose to, as well as rail drains that caught water and sent it below into jugs. Often by the time the passing squall had cleaned the salt off the sail and deck, the rain ended. Better to just enjoy the fresh water shower from the heavens.
Once at Hanalei, with the boom length awning funneling water into jugs, the regular nightly squalls kept WILDFLOWER's water supply topped up, and I never had to ferry water from the beachpark tap for my 5 return passages to the Mainland.