 In the AN/UYK-1 instruction set, the machine-language instructions had two operators that could simultaneously manipulate the arithmetic registers—for example, complementing the contents of one register while loading or storing another.It may have been the first computer that implemented a single-cycle indirect addressing ability.During a satellite pass, a GE receiver would receive the orbital parameters and encrypted messages from the satellite, as well as measure the Doppler-shifted frequency at intervals and provide this data to the AN/UYK-1 computer.