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
Structure of NATO Operations retained the title "Supreme Allied Commander Europe", and remains based at SHAPE at Casteau. He is a U.S. four-star general or admiral with the dual-hatted role of heading United States European Command, which is headquartered in Stuttgart, Germany. ACO includes Joint Force Command Brunssum in the Netherlands, Joint Force Command Naples in Italy, and Joint Command Lisbon in Portugal, all multi-national headquarters with many nations represented. From 2003, JFC Brunssum had its land component, Allied Land Component Command Headquarters Heidelberg at Heidelberg, Germany, its air component, Allied Air Command Ramstein, at Ramstein in Germany, and its naval component at