Naval Tactical Data System
"Mistral"-class ships can be used as command and control ships, with a command centre which can host up to 150 personnel. Information from the ship's sensors is centralised in the SENIT system ("Système d'Exploitation Navale des Informations Tactiques", "System for Naval Usage of Tactical Information"), a derivative of the US Navy's Naval Tactical Data System (NTDS). Problems in the development of the SENIT 9 revision contributed to the one-year delay in the delivery of the two ships. SENIT 9 is based around Thales' tri-dimensional MRR3D-NG Multi Role Radar, which operates on the C band and incorporates IFF capabilities. SENIT 9 can also be connected to NATO data exchange formats through Link 11, Link 16 and Link 22.