As part of its missions, the DSNA operates a fleet of ILS (Instrument Landing System) equipment. The reliability of these systems and the availability of service are paramount to ensure the accessibility of airports in adverse weather conditions. There are 2 categories of ILS in France (category 1 and category 3). This contract concerns only category 1 ILS. This equipment is renewed approximately every 20 years. Some currently in service are reaching that deadline and need to be replaced. The purpose of this contract is to supply and maintain a new fleet of Class 1 ILS systems - to maintain this new fleet in operational condition

identical to Ii.1.4