MIL-HDBK-293, MILITARY HDBK ELECTRONIC COUNTER-COUNTERMEASURES CONSIDERATIONS IN RADAR SYSTEMS ACQUISITION. This handbook provides guidelines for incorporating electronic counter-countermeasures (ECCM) into United States Naval radar Systems during the System acquisition process. The handbook should be useful to project or acquisition directors and other participants in the acquisition process, particularly cognizant managers in the office of the Chief of Naval Operations (CNO), the Naval Systems Commands (SYSCOM), the Naval Intelligence Center (NIC), the Naval Security Group (NSG), and personnel in the design, development and production agencies.