There are many uses for lettering in the world. Many of them are to ensure people get an important message. Stenciling on ships is widely used to make sure passengers receive important safety information. Letters are painted on walls and important safety equipment with instructions for use. Life rafts and vests are labeled this way to ensure all passengers can find them without difficulty in an emergency. Of course there are also messages for the general public such as political signs. Clear lettering is done with stencils to make those readable as well. To ensure uniformity and clarity in the letters, stencils are used.