Tattoos of firefighters are related to their professional activities. It could be a picture of a fire helmet with a Laurel wreath and hatchets, small tattoo. Or it could be a picture of a firefighter in a flame of fire, either at the time of extinguish fire. Sometimes over a fireman is depicted as the guardian angel. These tattoos occupy a very large space, so they are often put on the back.
Also on the tattoo indicates the Department that owns the fire, and life, if he left his place of work.