Block 40/45 will replace the aging AWACS computer system and the operator terminals with a network of commercial off-the-shelf operator workstations linked to several commercial off-the-shelf computers. A Gigabit Ethernet Local Area Network that adds digital communications for control of the radios, and for internal communications, will connect these computers. Block 40/45 will provide theater commanders enhanced surveillance and control capabilities while contributing to information superiority needed to control the battlespace. In addition, it will improve E-3B/C reliability and availability.