A contract modification has been given to General Dynamics to continue modernizing AN/BYG-1 Weapons Control System software for U.S. and Australian submarines.

AN/BYG-1 software analyzes and tracks submarine and surface-ship contact information, providing tactical, situational awareness and the capability employ torpedoes and missiles against targets.

"The AN/BYG-1 software program is an exceptionally cost-effective way for the Navy to quickly update and add capabilities to submarine weapon systems," said Carlo Zaffanella, vice president and general manager of Maritime and Strategic Systems for General Dynamics Mission Systems. "Many of the system updates and capability improvements are the direct result of feedback from sailors and their commanders who work with the systems every day."

The AN/BYG-1 software system uses commercial off-the-shelf hardware in an open-architecture computing environment, which allows for consistent maintenance and upgrading to the submarine's combat control systems.

General Dynamics was first contracted for work on the system in 2009. The modification is valued at $20 million.