The Dassault Mirage 2000N is a variant of the Mirage 2000 variant (based on the Mirage 2000B two-seat trainer, but features considerable changes) designed for nuclear strike which was intended to carry the Aerospatiale Air-Sol Moyenne Portee (ASMP) nuclear stand-off missile. It forms the core of the French air-based tactical nuclear deterrent. The Mirage 2000N was designed to French requirements for an aircraft to replace the older Mirage IVP.
The fighter had strengthened wings for low-altitude operations, as well as low-level precision navigation/attack systems, built around the Dassault/Thales Antilope 5 radar, which is used for terrain following, navigation and ground mapping, and which can follow terrain at 1.112 Km/h.
Other avionic features are twin INS's and moving map displays for both the pilot and weapon systems officer. The Mirage 2000N can carry one ASMP medium-range nuclear missile, and can also carry two MATRA Magic AAM's for self-defence. Other protection features include the Sabre jamming system and the Spirale chaff system. Because the extra seat decreases range, a pair of drop tanks are carried. Since the Mirage 2000N's standard weapon was the ASMP, which was carried on the centerline pylon, that meant it couldn't carry a centerline tank, but a distinctive big 2,000 liter (530 US gallon) underwing drop tank with a bulbous nose was developed to more than compensate.