NATO Communications and Information Systems Services Agency Command, Control, Communications, Intelligence, Surveillance and Reconnaissance (C4ISR) capabilities. The Director of NCSA was accountable to NATO's Consultation, Command and Control Board for executing the general policy decisions, directives and strategy associated with providing CIS services throughout NATO. The Director was also accountable to the Supreme Allied Commander Europe (SACEUR) for all operational, or deployed, CIS assets. In 2007, Canadian Forces internet sources said that NCSA comprised a central headquarters staff co-located with Allied Command Operations at the Supreme Headquarters Allied Powers Europe in Mons, Belgium; two deployable NATO Signal Battalions, each with four deployable communication modules, comparable in size
Supreme Headquarters Allied Powers Europe the flexibility and reach of land forces. The structure incorporated six "NATO Rapid Deployable Corps headquarters." Formed from October 2003, the NATO Rapidly Deployable Corps are designated High Readiness Forces (HRF), designed to be able to react on short notice. Although these forces cannot deploy on five days warning like the NATO Response Force (NRF), they have a longer sustainment capability in combat than the NRF, which is limited to 30 days. The Multinational Corps Northeast headquartered in Szczecin, Poland, was seen along with the downgraded Greek corps, as the third echelon deployable force in the NATO rapid deployment capability.