HomepageTagsLifebuoy Lifebuoy - online puzzles 36Billy World's End SlideSebSeasonsolved 21 timesSolve puzzle Online puzzle LifebuoyLifebuoyA lifebuoy is a life-saving buoy designed to be thrown to a person in water, to provide buoyancy and prevent drowning. Some modern lifebuoys are fitted with one or more seawater-activated lights, to aid rescue at night.