The 4K51 Rubezh / SSC-3 coastal defence system was also very widely exported. The 3P51 TELAR is based on the MAZ-543 8 x 8 chassis, and uses a trainable elevating two round launcher with a unique KT-161 launch tube design. Two radar configurations exist. Export systems are typically equipped with the same Square Tie search and fire control radar as fitted to corvettes and fast missile boats. Late models employed the 3Ts25E Garpun E targeting system, which combines an X-band radar component with a passive targeting system which operates between 0.8 and 12 GHz against pulsed and CW emitters, with an accuracy of 0.5 - 1.5 degrees.