Fibre optic gyrocompasses, radars and ECDIS are the chief products of the GEM Elettronica company. The Polaris FOG-100 and Polaris FOG-200 gyrocompasses are solid-state attitude and heading reference systems (AHRS) that are employed in ship navigation and in hydrographic survey for multibeam echo sounders (MBES). These ultra-precise instruments are zero maintenance and stand up to harsh environmental conditions.