Nothing Showing : The on-scene report of first arriving units that informs the dispatcher and other responding units that no smoke, fire, or other emergency situation is apparent
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}