Sperry Rand Corporation, Sperry Gyroscope Division, Great Neck, N.Y., has been awarded a $8,055,657 firm fixed-price contract to update and convert AN/SPG-55B radar antenna sets from MOD-5 to MOD-8 and MOD-9 under routine overhaul (ROH) FY 81 modernization program. The Naval Sea Systems Command is the contracting activity. (N00024-81-C-5201)