Northrop Grumman [NOC] said on Wednesday that it has completed the Critical Design Review (CDR) of the Navy’s WSN-12 Inertial Sensor Module and will begin producing 10 pre-production units.

The WSN-12 is set to be installed on all DDG-, CG-, CVN-, and SSN-class vessels.

The Inertial Sensor Module, a primary subsystem of the WSN-12, includes inertial sensors, electromechanical equipment, and software to compute navigation solutions. The inertial navigation system measures and provides navigation data including attitude, velocity, and position information.

“Completion of the CDR keeps this program on track to deliver exceptional navigation accuracy to the fleet,” Todd Leavitt, vice president of maritime systems, Northrop Grumman said.