US Navy Upgrades Trident II D5 ICBM Navigation System On November 4, 2026, the US Department of Defense awarded a contract to Lockheed Martin worth $122.4 million ($29, developed company, remaining options) to modernize the Trident II D5 ICBM navigation subsystem as part of the Shipboard Integration Supplement 8 program. Completion of the work is planned for October 31, 2030. The agreement is intended to replace the ESGN electrostatic gyroscopic navigation system, which was developed in the early 1980s and has served its intended service life. During the work, it is planned to update the software and the control panels. Work under the contract will affect four types of SSBN: the American Ohio and Columbia, as well as the British Vanguard and Dreadnought.

US Navy Upgrades Trident II D5 ICBM Navigation System On November 4, 2026, the US Department of Defense awarded a contract to Lockheed Martin worth $122.4 million ($29, developed company, remaining options) to modernize the Trident II D5 ICBM navigation subsystem as part of the Shipboard Integration Supplement 8 program. Completion of the work is planned for October 31, 2030. The agreement is intended to replace the ESGN electrostatic gyroscopic navigation system, which was developed in the early 1980s and has served its intended service life. During the work, it is planned to update the software and the control panels. Work under the contract will affect four types of SSBN: the American Ohio and Columbia, as well as the British Vanguard and Dreadnought.