Modern maritime operations demand high accuracy, reliability, and continuity—especially in rough seas, remote waters, and environments where GNSS signals may be limited, degraded, or unavailable.
In such conditions, relying solely on GNSS is often insufficient. Signal blockage, multipath effects near coastlines and offshore structures, and occasional interference can all affect navigation performance. To ensure safe and stable vessel operation, an autonomous navigation reference is essential.
A marine-grade Inertial Navigation System (INS) provides continuous navigation and attitude information without dependence on external signals. Even during GNSS degradation or outages, the INS maintains stable heading and motion outputs, supporting reliable navigation at sea.
Our marine-grade strapdown INS is built with RLG/FOG optical gyroscopes and high-precision quartz accelerometers, delivering accurate real-time measurements of heading, roll, pitch, yaw, and vessel motion. Designed for harsh marine environments, the system supports long-term, continuous operation under vibration, temperature variation, and high humidity.
The system supports pure inertial, GNSS-aided, and velocity-aided operation modes, allowing flexible integration with onboard sensors such as gyrocompasses, speed logs, and other marine navigation instruments. This multi-mode capability enhances navigation continuity and redundancy, particularly in coastal waters, narrow channels, and open-sea operations.
Marine-grade INS technology is widely used across a range of maritime platforms, including dynamic positioning (DP) vessels, offshore platforms, survey ships, and unmanned surface vessels (USVs).
In real-world applications, similar high-performance FOG and RLG-based INS systems have proven essential. For instance, in offshore DP operations, INS integrates with Doppler velocity logs to maintain precise station-keeping for supply vessels and drilling platforms, even in challenging North Sea conditions. On hydrographic survey ships, FOG INS combined with multibeam sonar ensures accurate seabed mapping during GNSS outages, as seen in deepwater surveys and remote oceanographic missions.
Additionally, advanced INS enables autonomous navigation for USVs in pipeline inspections and port surveys, reducing personnel exposure while delivering continuous data in GNSS-denied areas like near offshore structures.
By providing stable and reliable navigation and attitude data under all operating conditions, INS plays a key role in enabling safer, more efficient, and more dependable modern maritime operations.
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