The superstructure profile was designed to accommodate the fixed phased array scanners of the Soviet Navy's Mars-Passat 3D air search radar system, along with extensive command and control facilities to conduct an aerial campaign. Extensive revamp of sensors was carried out, with long range air-surveillance radars and advanced electronic warfare suites fitted, which enable the maintenance of a surveillance bubble of over 500 km around the ship. An aft mast was installed to accommodate various communication antennae. These changes needed 2,300 km of new cables, and 3,000 km of new pipes.