Abstract: A method and system of maintaining continuity of computer control and information exchange between moving vehicles such as aircraft and a computer, with a different computer being operative as a given moving vehicle moves from a first defined sector to a second defined sector, the data link between each computer and the moving vehicles located in its sector being provided by radio transmission. Each sector has a different given transmission frequency. A transition area is defined at the interface between the first and second defined sectors wherein the moving vehicle is under joint control of the computers of the successive sectors.