When sailing in the south Pacific
aboard a mono we always reefed the main sail and doused the genny and hung a five gallon bucket that was fitted with a garden hose on the bottom, at the goose neck, pulled out the soap and steered towards the leading edge, always got a real nice fresh water shower
and topped off the potable tanks
after everyone was finished washing
and the deck
was rinsed off. Now we did use the binoculars prior, to evaluate how intense the winds were and never had any problems. This was before watermakers.