EC-135 National Emergency Airborne Command Post

Target entity: EC-135 National Emergency Airborne Command Post
Context triple: [E-4B National Airborne Operations Center fleet, successorTo, EC-135 National Emergency Airborne Command Post]

• A. Boeing E-4
  The Boeing E-4 is a militarized, heavily modified Boeing 747 airframe used by the U.S. Air Force as a survivable airborne command post for national command authority during nuclear or other major crises.
• B. Boeing E-3 Sentry
  The Boeing E-3 Sentry is an airborne early warning and control (AEW&C) aircraft based on the Boeing 707 airframe, distinguished by its large rotating radar dome used for long-range surveillance and battle management.
• C. Lockheed EC-130H Compass Call
  The Lockheed EC-130H Compass Call is a heavily modified C-130 Hercules aircraft used by the U.S. Air Force for tactical airborne electronic warfare and communications jamming operations.
• D. Boeing E-6 Mercury
  The Boeing E-6 Mercury is a U.S. Navy airborne command post and communications relay aircraft used to maintain secure links with nuclear forces, derived from the Boeing 707 airframe.
• E. E-4B National Airborne Operations Center fleet
  The E-4B National Airborne Operations Center fleet is a group of highly modified Boeing 747 aircraft that serve as survivable, airborne command posts for U.S. national command authorities during nuclear or other major crises.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: EC-135 National Emergency Airborne Command Post
Target entity description: The EC-135 National Emergency Airborne Command Post was a modified U.S. Air Force aircraft used during the Cold War as an airborne command center to ensure national command authority could survive and operate during a nuclear conflict or other major crisis.

• A. Boeing E-4
  The Boeing E-4 is a militarized, heavily modified Boeing 747 airframe used by the U.S. Air Force as a survivable airborne command post for national command authority during nuclear or other major crises.
• B. Boeing E-3 Sentry
  The Boeing E-3 Sentry is an airborne early warning and control (AEW&C) aircraft based on the Boeing 707 airframe, distinguished by its large rotating radar dome used for long-range surveillance and battle management.
• C. Lockheed EC-130H Compass Call
  The Lockheed EC-130H Compass Call is a heavily modified C-130 Hercules aircraft used by the U.S. Air Force for tactical airborne electronic warfare and communications jamming operations.
• D. Boeing E-6 Mercury
  The Boeing E-6 Mercury is a U.S. Navy airborne command post and communications relay aircraft used to maintain secure links with nuclear forces, derived from the Boeing 707 airframe.
• E. E-4B National Airborne Operations Center fleet
  The E-4B National Airborne Operations Center fleet is a group of highly modified Boeing 747 aircraft that serve as survivable, airborne command posts for U.S. national command authorities during nuclear or other major crises.
• F. None of above. chosen