E-3 SentryBoeing E 3 Sentry model. The E 3 Sentry is an airborne warning and control system (AWACS) aircraft that provides all weather surveillance, command, control, and communications necessary for the commanders of U. S. and NATO air defense forces. Demonstrated in operations such as Desert Storm and Operation Allied Force, it stands as the world's foremost air battle command and control aircraft. The E 3 Sentry is a modified Boeing 707 320 commercial