Actual Response Time : The total period of time measured from the time of an alarm until the first ARFF vehicle arrives at the scene of an aircraft accident and is in position to apply agent
NFPA 403 Standard for Aircraft Rescue and Fire-Fighting Services at Airports, 2009 ed. http://www.nfpa.org/assets/files/aboutthecodes/403 /403-a2013-rop.pdf, (Std: Aircraft Rsq and Fr Fight Srvc at Airpt - Amer) {302 NFC}