Find suppliers and manufacturers of Marine Inertial Navigation Systems including Maritime INS for unmanned and autonomous vessels; UUV, AUV, USV and ROV INS
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High-Accuracy Navigation & Positioning Solutions for Unmanned & Autonomous Vehicles
BVLOS Solutions for UAS & UAM: Fuel Cells, Radar, Navigation Sensors, Flight Control & SATCOM
Robotics and Subsea Technologies for Defense, Commercial & Science Applications
High-Performance Inertial Navigation Systems (INS) for Unmanned Systems
Inertial Navigation & Positioning Technology for Unmanned, Autonomous Systems
Inertial Navigation Sensors: MEMS IMU, Accelerometers, Gyroscopes, AHRS, GPS-INS & Point Cloud Generation
Inertial Navigation Systems, INS/GPS, AHRS, and IMU Sensors for Unmanned Systems
Precise Positioning for Unmanned Vehicles: GPS & GNSS Receivers, Antennas & Inertial Systems
High Performance FOG, RLG, and Quartz MEMS Inertial Sensors - Gyros, IRU, IMU, INS
MEMS Inertial Sensors: IMUs, GPS-Aided INS, Gyroscopes, Accelerometers, AHRS
Tracking, Navigation, Positioning and Communication Sensors for AUV, ROV, USV
Integrated Systems & Payloads for Unmanned Surface & Underwater Platforms Operating in Complex Maritime Environments
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Boreas D90 Digital FOG INS for Marine Unmanned Systems by Advanced Navigation
Marine INS (inertial navigation systems) provide essential position, orientation and velocity data for marine and maritime unmanned systems such as UUVs (unmanned underwater vehicles), AUVs (autonomous underwater vehicles), ROVs (remotely operated vehicles) and USVs (unmanned surface vessels). Once initialised, they are able to do this without requiring an external reference.
The core of the marine INS is the IMU (inertial measurement unit). This is made up of MEMS accelerometers, gyroscopes, and depending on the system, magnetometers. Multiple-axis IMUs will have multiples of each sensor – a three-axis IMU will have three of each mounted orthogonally to each other. Depending on the size, cost and performance requirements, IMUs may use MEMS (micro-electromechanical system), FOG (fiber optic gyro) or RLG (ring laser gyro)-based sensors.
Rovins Subsea INS by Exail
The IMU outputs angular rate, acceleration and magnetic measurements. These need to be further processed in order to obtain position, orientation and velocity, and so an INS will combine the IMU with some kind of computing capability.
Autonomous surface and underwater navigation requires highly accurate heading, roll, pitch, velocity and position information, and so marine INS are crucial for such applications. They are also ideal for station-keeping and stabilization in rough waters for USVs and UUVs, and also allow ROV operators to know if their vehicle is well-positioned.
SPRINT-Nav Marine Navigation System by Sonardyne International
Small errors in inertial sensor measurements can compound over time to create significant drift. For systems operating on the surface of the water, INS performance can be increased by combining the data with the output from a GNSS receiver. These GNSS-aided INS use sensor fusion to combine the two sources of data and improve the position, orientation and velocity estimates.
GNSS signals cannot penetrate underwater, but AUV and ROV inertial performance can similarly be enhanced by combining the INS with a source of acoustic data such as a USBL (ultra-short baseline), LBL (long baseline) or DVL (Doppler velocity log) sensor.
Marine INS will typically be rated for immersion in water as well as resistance to salt corrosion, and systems designed for underwater use will also be pressure-rated to a particular depth.
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