This handbook provides guidelines for incorporating electronic counter-countermeasures (ECCM) into United States Naval communication systems during the system acquisition process. While the handbook is specifically addressed to the project or acquisition director, it should be useful to other participants in the acquisition process, particularly cognizant managers in the office of the Chief of Naval Operations (CNO), the Naval Intelligence Center (NIC), the Naval Security Group (NSG), and personnel in the design, development, and production agencies.