Purpose of ATP-451. The purpose of this publication is to prescribe the nuclear@ biological and chemical (NBC) procedures to be followed by the Land@ Air and Naval forces for the:a. Reporting of all nuclear detonations and of enemy biological or chemical attacks and resulting contamination. Reporting of NBC releases other than attack (ROTA).b. Predicting and warning of hazard areas from NBC attacks and from ROTA.c. Evaluation of NBC information and the influence of NBC incidents on operations.d. Interchange of reports@ quoted in a. b. and c. above@ between NATO forces and national military and civil authorities and agencies.