There are three main types of water safety signs and each one has its own meaning. Yellow triangle water safety signs mean that people should be aware of something. Red rings with white backgrounds are water safety signs that tell you that it would be dangerous to do something, or go in that place. Blue, circle-shaped with symbols are water safety signs that tell you that you should do something to be safe. Other types include information signs, which are always on a white background with black symbols or text, these water safety signs are used to help you either find something, or get somewhere. Browse the full range of water safety signs available to buy online at Work & Wear Direct.