Facility set for navigation system repair HEATH, Ohio, April 27 (UPI) -- Boeing has opened a new repair and maintenance line for the navigation systems of the U.S. Navy's Trident missiles. The new line at its existing facility in Heath, Ohio, increases capability for maintenance and repair of the Electrostatically Supported Gyro Navigator, it said. "As the sole supplier of navigators for the U.S. Navy's ballistic missile submarine fleet, we believe this new line will allow for a long-range sustainable advantage in product maintenance while we develop the next generation of ultra-high-precision inertial systems," said Joe Carlin, vice president of Boeing subsidiary Argon ST. Boeing said the Heath facility of its subsidiary features about 14,000 square feet of space dedicated to the ESG Stable Platform Housing refurbishment and test program. It also has space for modification, repair, maintenance and storage. The cost of the improvements and upgrades were about $4 million. The Ohio Department of Development, the Heath-Newark-Licking County Port Authority and American Electric Power invested in the project. The Heath facility is Boeing's Center of Excellence for maintenance, repair and overhaul of guidance and navigation systems, inertial instruments and platforms. Under a current contract, Argon ST will perform the services on the Trident navigation systems until 2025.