Water Mist Extinguishing - Suppression System Hazardous Area - Fire Safety Sign Fire Signs are designed to show location of fire-fighting equipment including extinguishers, hose reels and alarms. "AS 2444:2001 Water Mist Extinguishing - Suppression System Hazardous Area - Fire Safety Sign Fire Signs are designed to show location of fire-fighting equipment including extinguishers, hose reels and alarms. "AS 2444:2001 Portable Fire Extinguishers And Fire Blankets, Selection and Location", specifies fire signs are required to locate fire extinguishers and blankets.