The Kearfott family of land navigation products provide high accuracy navigation and pointing for surface vehicles, tanks, and artillery. They are available as Inertial Navigation Systems (INS), Land Navigation Kits, or incorporated into Indirect Fire Systems. All of the Kearfott land navigation products are built with a modular architecture providing scalable inertial performance while allowing significant size constraints to be realized. Additionally, the land navigation products are configurable to platform requirements, including GPS and other aiding inputs. Accurate performance is maintained even under the extreme shock and vibration environments in the battlefield.