Compact Fiber Optic Gyroscope for Marine & Subsea Navigation

The G321M is a ruggedized 3-axis fiber optic gyroscope (FOG) developed for precise angular velocity measurement in marine and subsea environments. Tailored to meet the stability and endurance demands of oceanographic missions, the G321M offers exceptional reliability for use in AUVs, ROVs, buoy systems, and instrumented underwater platforms.

Encased in a corrosion-resistant aluminum alloy housing and measuring just 53 x 53 x 36 mm, the G321M delivers robust performance in constrained subsea installations. With an operating temperature range from -40°C to +70°C and survival tolerance down to -55°C, it supports deployment in thermally dynamic ocean layers and polar research zones.

Engineered to maintain accuracy under harsh mechanical stress, the unit is rated to handle 6g RMS vibration and impacts up to 350g, ensuring consistent performance during launch, recovery, and transit through turbulent waters. With a 400°/s input range, 1kHz bandwidth, and 8kHz data output rate, the G321M supplies high-frequency inertial data essential for real-time stabilization, navigation, and georeferenced sensor alignment.

Weighing only 145g (0.3lb) and drawing just 2 watts, the gyro is optimized for integration into energy-conscious marine platforms. Its fast response and low-noise performance make it ideal for hydrodynamic motion compensation, subsea station-keeping, and dead-reckoning in GPS-denied environments.

The G321M offers a robust, low-profile solution for ocean technology developers seeking high-performance inertial sensing in operationally demanding marine contexts—from deepwater research to coastal unmanned exploration.