Overview
Marine Inertial Navigation Systems
Advanced Navigation Boreas D90 FOG INS for Marine & Subsea applications
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.
Maritime Inertial Measurement Units
The core of the marine INS is the IMU (inertial measurement unit). This is made up of 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.
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 & Underwater Navigation
SPRINT-Nav Subsea Navigation Sensors by Sonardyne
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.
GNSS & Acoustic Data Aided INS
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.
Products (47)
Refine
Attributes
Weight
matching products
Related Articles
Platinum Partners
ANELLO Photonics
Innovative Silicon Photonics Optical Gyroscope Technology and Navigation Solutions for GPS-Denied Environments
Honeywell Aerospace Technologies
BVLOS Solutions for UAS & UAM: Fuel Cells, Radar, Navigation Sensors, Flight Control & SATCOM
Advanced Navigation
AI-based Inertial Navigation Systems (MEMS and FOG), Acoustic Positioning Solutions
Inertial Labs, a VIAVI Solutions Company
Inertial Navigation Sensors: MEMS IMU, Accelerometers, Gyroscopes, AHRS, GPS-INS & Point Cloud Generation
NovAtel
Precise Positioning for Unmanned Vehicles: GPS & GNSS Receivers, Antennas & Inertial Systems
Gold Partners
EMCORE Corporation
High Performance FOG, RLG, and Quartz MEMS Inertial Sensors - Gyros, IRU, IMU, INS
Sonardyne International
Tracking, Navigation, Positioning and Communication Sensors for AUV, ROV, USV
Inertial Navigation Systems (INS)
Miniature Inertial Navigation Systems
Underwater Navigation and Positioning
Underwater Sensors
Join Thousands of Unmanned Systems Professionals
Sign up free to UST Pro to get full website access, the weekly eBrief and exclusive event discounts.
