Serious radar indeed. SELEX Sistemi Integrati is at the forefront of long range radar technology with RAT31, a proven state-of the art, 3D long range radar systems family. The RAT31 DL, effective to a range of over 500 kilometres, is an advanced L-band solid state phased array, 3D surveillance radar, with an advanced architecture incorporating multiple independent and simultaneous pencil beams, all proven solutions already in use in many radars of the same family. The RAT31 radar system is going to be the prime sensor for the NATO area air defence and it is going to be the standard NATO radar for air defence.