Range Safety Officer (RSO) : A certified user with overall responsibility for the safety, setup, and launching of all rockets at a high power rocket launch
NFPA 1127 Code for High Power Rocketry, 2008 ed. www.loyola.edu/~/media/department/ehs/.../nfpa%20c ode%20list.ashx, (Code: High Pwr Rocketry - Amer) {381 NFC}