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SIGMA 40, an attitude/heading and inertial navigation system, optimizes sensor, weapons and self-defense equipment on warships. All SIGMA solutions are based on high-grade Ring Laser Gyros technology, making navigation systems highly reliable with excellent long-term measuring accuracy. Sigma 40 is complete and upgradeable, easy to install, maintain and use on all surface vessels. In order to cover your various operational needs, it is available in several versions or solutions like SIGMA 20M, a gyrocompass designed for demanding naval applications. SIGMA 40 is used by 40 navies and is the world's top-selling naval inertial navigation system.
Capitalizing on Safran Electronics & Defense's 70-year experience in inertial technologies, Sigma 20M is a compact strap down and cost-effective full MIL-Spec gyro compass & AHRS. Based on advanced Hemispherical Resonator Gyros (HRG), Sigma 20M expands the well-known Sigma 40 Ring Laser Gyro INS family, the world's high performance best-selling naval INS.
Thanks to its solid state technology, Sigma 20M is maintenance free and provides unrivalled reliability and operational availability. Sigma 20M does not require GPS aiding to deliver full accuracy. It makes it the perfect solution in GPS denied situations.