'Sword') is a Russian (former USSR) all-weather multimode airborne radar developed by the Tikhomirov Scientific Research Institute of Instrument Design (NIIP) for the Su-27 multi-role combat aircraft.

Pushing the state of the art for the USSR, the original design, known as Mech, was supposed to draw heavily on technologies developed for the experimental Soyuz radar program led by NPO Istok.

It was intended to have a great deal of commonality with the MiG-29's N019 Rubin radar.

A pulse-doppler design operating in the 3 cm band using medium and high PRFs for optimum lookdown capability, the N001 has a search range of 80–100 km against a 3m2 RCS target in a headon engagement, 140 km against a large bomber.

In a pursuit engagement, search range for a 3m2 target falls to just 40 km.