The Boeing E-6 Mercury is an airborne command post and communications relay based on the Boeing 707-320. The original E-6A manufactured by Boeing's defense division entered service with the US Navy in July 1989 replacing the EC-130Q. It conveyed instructions from the National Command Authority to fleet ballistic missile submarines a mission known as TACAMO (Take Charge and Move Out).
Made by Boeing.
It is the successor of the Boeing 707 .