 The Model 1972 mortar replaced the forward 127 mm turret and the fire control director for the main armament was removed.The DRBC 31 radar was moved to the fire control director's former spot atop the bridge and the DRBV 11 radar was replaced by an SPS-39A 3D model, later upgraded to the B model.The complement was reduced to 278, comprising 17 officers and 261 ratings.