Water:

Drinking water causes more sickness than all other foods combined, and yachtsmen cannot be too careful where they get their supply. If you are not certain sure of the fluid, boil it before using. Also keep your tanks clean, and don’t put new water in on top of old that has been in the tanks for weeks, or perhaps months. One time I was going on a cruise and ordered the crew to fill the tanks, but cautioned them not to take the supply from a pipe that led to the dock, but to go to the clubhouse for it. When my back was turned they decided that the pipe water was good enough, and filled up with it. Consequently we got a dose of iron rust that laid the whole crowd out for three days with an attack that would have turned Mr. Beacham green with envy. If the water gets riley from shaking up in a seaway you can instantly clear it for drinking by putting in the glass a few drops of lime juice.