The US Navy recently took delivery of its first upgraded E-6B Mercury aircraft, marking a major milestone in efforts to modernize the fleet’s communications capabilities. The delivery is the first of 16 planned upgraded E-6B models that will replace the Navy’s current fleet of aging aircraft.

The E-6B Mercury is an airborne command post and communications relay based on the Boeing 707 airframe. Its primary mission is to ensure reliable communications between the national command authority and US nuclear forces, even in the event of a nuclear attack. The upgraded E-6B features new digital avionics systems, upgraded navigation technology, and enhanced network-centric communication abilities.

According to Rear Admiral John Meier, Commander of Naval Air Forces, “The upgraded E-6B will enable us to operate in today’s communication environment and well into the future. The fleet can now leverage digital connectivity and real-time intelligence that this aircraft delivers.”

Key upgrades include replacing 1970’s-era analog systems with digital flight instruments, installing GPS navigation technology, and adding network-centric communication systems. This enhances the E-6B’s ability to communicate with multiple platforms and pass data in real-time.

The $500 million E-6B upgrade program aims to extend the Mercury’s service life another 25 years. The current E-6B fleet averages over 30 years of age. Replacing outdated components with modern avionics and communication gear will keep the airframe relevant for future Navy requirements.

As the rest of the upgraded E-6B fleet comes online, the Navy will begin phasing out its oldest E-6B models. The final upgraded aircraft is expected to be delivered by 2021. With its critical nuclear command-and-control mission, the E-6B modernization program is considered a top priority for improving the Navy’s communication resiliency and efficiency.