This Navy Training Course was written to serve as an aid for enlisted men of the U.S. Navy and the U.S. Naval Reserve who are preparing for 3 and Fire Control Technician M (missile fire control) 3. It is one of a series of Navy Training Course designed to give enlisted men background information of the duties of their rate. The predominant factor in the selection of content for this publication has been the Manual of Qualifications for Advancement in Rating, NavPers the two service ratings are almost the same at this level, it made sense to keep the study material in one volume. This book was prepared for the Bureau of Naval Personnel by the Training Publications Division, Naval Personnel Program Support Activity.