U-INS Plus | The Next-Gen Underwater Inertial Navigation System

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The Next-Gen Underwater Navigation System

Redefining Underwater Positioning & Navigation

Why Choose U-INS Plus?

The All-New Upgrade Underwater Inertial Navigation System

U-INS Plus is the next-generation underwater inertial navigation system, upgraded on U-INS, the QYSEA self-developed AI navigation software for ROVs. While retaining robust underwater positioning and navigation, it adds surface inspections capabilities including surface route planning and surface-adaptive navigation.

It plans and executes surface-following routes with precise depth and standoff control, delivering accurate, repeatable data on dams, bridge piers, and ship hulls, boosting inspection efficiency and accuracy while reducing risk and cost.

Trial Application

Before applying for a trial, ensure you own a FIFISH underwater robot. Then, contact us with your ROV model and serial number. After review, an activation code will be emailed to you. Each user may apply once; batch applications are not allowed. The license is bound to a single PC and cannot be transferred during the trial. Please activate the code within three days, or it will expire. The trial period will be stated in the confirmation email.

Surface Navigation

Surface Route Planning

Surface-Adaptive Navigation

Defect Tagging

Forward Station Lock

Collision Avoidance

Cost-effective Underwater Positioning & Navigation

Intelligent Cruise Along Structure Surfaces

Boost Inspection Efficiency & Accuracy

Surface Navigation

U-INS Plus controls depth and forward standoff for surface navigation, enabling planned inspections of vertical and horizontal faces, as well as overhead undersides, with wide coverage and consistent accuracy.

Surface Route Planning

Select a planning mode and set key parameters such as route direction, length, forward standoff, and surface spacing. Manage both rapid, large-area coverage on complex structures and precise, detailed tasks with tailored routes that maximize efficiency and coverage.

Surface-Adaptive Navigation

Leveraging U-INS Plus, the ROV maintains a fixed standoff and follows the surface profile to ensure consistent data on flat, convex, concave, and irregular structures. This is ideal for inspections of ports, bridge piers, dams, aquaculture cages, tunnels, tank interiors, and ship hulls.

Pair the Forward/Side Q-DVL with 4K imaging to cruise along a surface vertically or at oblique angles. Pause at any time and use 360° 6-DOF movement to switch to any angle for close-up documentation and faster troubleshooting.

Defect Tagging

Once a defect is identified and tagged, the system records its coordinates and displays details for easy review, enabling quick return for precise inspection, enhanced traceability, and efficient maintenance.

Forward Station Lock

U-INS Plus estimates relative ROV flow speed and direction in real time, maintaining precise hovering along the planned path even in turbulent or sudden currents.

Collision Avoidance

Utilizing FIFISH’s forward Q-DVL distance sensing and intelligent standoff control, U-INS Plus detects obstacles in real time and automatically slows or stops to reduce collision risk and protect the vehicle.

Fast & Effortless Deployment

Lightweight and portable, the FIFISH ROV system can be set up and deployed in under five minutes to handle a variety of tasks. Its intuitive UI streamlines route planning and automatic navigation, reducing manual work and enhancing operational efficiency.

Real-time Unified View

Throughout the operation, the visual interface integrates live video, underwater situational awareness, progress tracking, and real-time positioning, giving operators an instant view of their surroundings and enabling more efficient work.

Live Video Feed

Provides an HD view in real time for detailed capture and decision-making.

Cruise Progress

Displays the live track and progress, allowing task status to be seen at a glance.

Underwater Situational Awareness

Shows live vehicle state and environmental metrics such as attitude, speed, and current.

Real-time Position

Continuously updates with ROV’s current coordinates and heading for precise localization.

Frequently Asked Questions (FAQ)

Which ROV models are compatible with U-INS Plus?

A: Currently supported: E-MASTER. Coming soon: FIFISH X1. More compatible models are coming soon. Please stay tuned.

What hardware accessories are required for U-INS Plus?

A: Forward-facing Q-DVL (core component). A GNSS Locator is required if latitude and longitude recording is needed.

How does U-INS Plus navigation system work?

A: U-INS Plus adopts an upgraded sensor fusion solution, which coordinates GNSS navigation and inertial navigation. When the ROV is on the surface, U-INS Plus utilizes GPS/BeiDou/GLONASS to provide absolute coordinates. Once submerged, the ROV uses Q-DVL aiding and IMU sensors to continuously estimate and correct its underwater position in real time, ensuring precise navigation even in the absence of GNSS signals.

What is the difference between U-INS Plus and U-INS?

U-INS Plus is a next-generation upgrade based on U-INS. It retains all robust underwater positioning and navigation capabilities of the original U-INS (e.g., subsea route planning, station lock hovering, downward collision avoidance) while adding new surface inspection features, including surface navigation, surface route planning, surface-adaptive navigation, defect tagging, forward station lock, and forward collision avoidance. Additionally, it ingrates with more hardware modules such as Forward/Side Q-DVL (Side Q-DVL scheduled for future software release) compared to the original U-INS’s Downward Q-DVL and GNSS Locator only.

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