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NAV-3000 Integrated Navigation System

Underwater INS/DVL/Pressure Sensor

The NAV-3000 Integrated Navigation System is primarily composed of three core underwater sensing units: an Underwater Inertial Navigation System (INS), an Underwater Doppler Velocity Log (DVL), and an Underwater Pressure Sensor. It achieves high-precision positioning, attitude calculation, and depth monitoring for underwater vehicles through multi-source data fusion algorithms.

NAV-3000 ​

Key Features:

  • Compact size, high accuracy, autonomous north-seeking, immune to magnetic interference.
  • Straight-line navigation accuracy: ≤0.5% of distance; Z-shaped survey pattern accuracy: ≤0.1%.
  • Integrated high-resolution pressure sensor, 3000 m depth-rated version with 1.5 cm resolution.
  • Phased array DVL, navigation accuracy unaffected by sound speed variations.
  • Automatically switches to water-track mode when bottom-track is lost in deep water.
  • Supports USBL position aiding with automatic outlier rejection.
  • Built-in Wi-Fi module for configuration and data access.

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Overview

Performance 

NAV-3000 is a new-generation integrated navigation system, designed for high-precision AUV / ROV underwater navigation.

  • Autonomous north-seeking: achieves self-alignment by sensing the Earth’s rotational angular velocity, without relying on magnetic fields.
  • Pressure-resistant design: titanium-alloy housing allows direct underwater deployment without modifications.
  • Core sensors: integrates a phased-array DVL and a high-resolution pressure sensor.
  • Combined positioning: supports DVL, GPS, and USBL integration, outputting attitude, position, velocity, and depth data.

  • Navigation accuracy: with DVL integration, achieves 0.5% of distance traveled in straight-line navigation and 0.1% of distance traveled during area mapping.
  • Depth measurement: pressure sensor resolution 0.0005% of full scale, accuracy 0.05% of full scale.
  • IMU and data fusion: enhances attitude and heading accuracy, ensuring stable underwater navigation.

Specifications

Specification Parameter
DimensionsMax. diameter: 193 mm, height: 277 mm
Weight in air14.2 kg
Max. operating depth3000 m
External sensor supportGPS (NMEA0183)/USBL position system
Depth sensor accuracy±0.05% of full scale
Depth sensor resolution0.0005% of full scale (1.5 cm at 3000 m)
Attitude accuracyPitch/roll: 0.03° (RMSE)
Heading accuracy (moored, no DVL/GPS)0.25° (RMSE)
Heading accuracy (INS/DVL)0.25° (RMSE)
Travel distance error (Z-shaped survey)≤0.1% of distance
Travel distance error (straight line)≤0.5% of distance
Power supply24 V ±1 V

Applications


  • Deep-sea research, mapping, and sampling 
  • Pipeline and cable inspection, subsea infrastructure monitoring 
  • AUV/ROV autonomous navigation missions 
  • Regional ocean environmental monitoring 


Navigation Mode

SINS / DVL / GPS / Depth Sensor Integrated Navigation Mode

This is the default operating mode of the system. 

Features:

  1. When GPS velocity is valid, SINS integrates with GPS.
  2. When GPS is invalid, SINS integrates with depth sensor and DVL. If both water-track and bottom-track are valid, bottom-track velocity is used. In deep water, if only water-track is available, SINS integrates with water-track velocity.
  3. If both DVL and GPS are invalid, the system enters vertical gyro mode: velocity is zeroed, but accurate attitude is maintained.
  4. When valid USBL position is received, outliers are automatically rejected and navigation error is corrected.

AUV Communication & Navigation Kit


DVL-600K / DVL-300K & UAC-08160X Series
 
To meet the demanding requirements of Autonomous Underwater Vehicles (AUVs) for high-precision navigation and reliable communication, we offer the AUV Communication & Navigation Kit. This solution integrates the Doppler Velocity Log (DVL) with the Underwater Acoustic Communication (UAC) system, providing a comprehensive package for scientific research, underwater inspection, and long-range operations.

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