The AN/BRN-3 satellite navigation receiver with CP-677 computer. Yes, ALL FOUR CABINETS! The Bunker Ramo CP-677A/BRN-3 computer is the first cabinet on the left. The next cabinet is the CV-1296/BRN-3 Data Processor. The two cabinets on the right are the Westinghouse R-1132/BRN-3 Receiver.