An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

E-6B Mercury Airborne Command Post

Last updated: 22 Sep 2021


Communications relay and strategic airborne command post aircraft. Provides survivable, reliable, and endurable airborne command, control, and communications between the National Command Authority (NCA) and U.S. strategic and non-strategic forces. Two squadrons, the "Ironmen" of VQ-3 and the "Shadows" of VQ-4 deploy more than 20 aircrews from Tinker Air Force Base, Oklahoma to meet these requirements.


Boeing derived the E-6A from its commercial 707 to replace the aging EC-130Q in the performance of the Navy's TACAMO ("Take Charge and Move Out") mission. TACAMO links the NCA with naval ballistic missile forces during times of crisis. The aircraft carries a very low frequency communication system with dual trailing wire antennas. The Navy accepted the first E-6A in August 1989.

The E-6B was conceived as a replacement for the Air Force's Airborne Command Post due to the age of the EC-135 fleet. The E-6B modified an E-6A by adding battlestaff positions and other specialized equipment. The E-6B is a dual-mission aircraft capable of fulfilling either the TACAMO mission or the airborne strategic command post mission and is equipped with an airborne launch control system (ALCS). The ALCS is capable of launching U.S. land based intercontinental ballistic missiles. The first E-6B aircraft was accepted in December 1997 and the E-6B assumed its dual operational mission in October 1998. The E-6 fleet was completely modified to the E-6B configuration in 2003.


General Characteristics
Primary Function: Communications relay for fleet ballistic missile submarines (A and B models) and airborne command post for U.S. Strategic forces (B model)
Contractor: The Boeing Company
Date Deployed: October 1998
Unit Cost: 141.7 million
Propulsion: Four CFM-56-2A-2 High bypass turbofans
Length: 150 feet, 4 inches (45.8 meters)
Height: 42 feet 5 inches (12.9 meters)
Wingspan: 148 feet, 4 inches (45.2 meters)
Weight: Max gross, take-off. 342,000 lbs (154,400 kg)
Airspeed: 522 knots, 600 miles (960 km) per hour
Ceiling: Above 40,000 feet
Range: 6,600 nautical miles (7,590 statute miles, 12,144 km) with 6 hours loiter time
Crew: 22

Point of Contact
Naval Air Systems Command
PMA-271 Public Affairs

47123 Buse Rd
Bldg. 2272, Suite 162
Patuxent River, MD 20670-5440

(301) 757 8690


Google Translation Disclaimer

Guidance-Card-Icon Dept-Exclusive-Card-Icon