FIFISH W6 NAVI — Maritime AI Underwater ROV
Maritime ROV · W Series
QYSEA's maritime-class ROV — deep-learning U-INS navigation, Q-DVL station lock, dual 4K cameras and built-in 2D/3D bathymetric mapping in a single 350 m platform built for the open sea. Precision meets versatility.
The W6 NAVI in the Field
Navigate · Inspect · Survey · Map
One platform built for the open ocean
The FIFISH W6 NAVI is QYSEA's maritime-class ROV — engineered for sustained operation in the open sea, where depth, current and navigation demands go a step beyond the V and E Series. At 350 m depth with a 10 kg payload capacity, it reaches targets and carries equipment that lighter ROVs cannot, while its onboard navigation and survey systems turn a single dive into a complete inspection-and-survey deliverable.
- 350 m depth rating · 10 kg payload · 360° omnidirectional movement
- U-INS deep-learning underwater inertial navigation — no GPS or transponders
- Q-DVL station lock · downward collision avoidance · altitude tracking
- Dual 4K UHD cameras · 12 MP each · 166° H / 100° V FOV · ISO 6400
- 12,000-lumen LED illumination matched to the dual-camera field of view
- QY-BT 2D/3D bathymetric mapping built in · QY-MT laser-scaler measurement
- 388.8 Wh removable battery · 70% quick charge in one hour
The problems the W6 NAVI was built to solve
Open-water inspection and survey work pushes lightweight ROVs past their limits. The W6 NAVI was designed specifically to operate where they can't.
🌑 No GPS at Depth
GPS is unavailable subsea and acoustic positioning is expensive. U-INS fuses onboard sensors with deep learning to navigate without external infrastructure.
🌊 Current & Swell
Current, swell and tether drag push a free-flying ROV off target. Q-DVL station lock holds a precise 3D position so the pilot can work hands-free.
⬇️ Depth Limits
Many micro-ROVs stop well short of deep targets. The W6 NAVI's 350 m rating reaches structures and recovery objects that lighter vehicles cannot.
📋 Two Jobs, One Dive
Inspection and survey usually mean separate mobilisations. Built-in QY-BT mapping collects seabed data during every normal inspection dive.
U-INS — Underwater Inertial Navigation System
At depth, GPS is unavailable and acoustic positioning systems are expensive. The W6 NAVI's U-INS uses deep learning and multi-sensor fusion to provide subsea positioning — autonomously, without external infrastructure.
Hold position and fly planned routes — without GPS
U-INS fuses Q-DVL velocity data, a depth sensor, IMU and compass into a deep-learning position model — continuously correcting for sensor drift and current-induced error to estimate subsea position without GPS or external transponders. Plan inspection routes and survey transects on the surface, deploy, and the W6 NAVI executes them while logging the actual track against the plan.
- Subsea positioning from deep-learning sensor fusion — no transponders
- Custom route & survey-grid execution without continuous pilot input
- Single-tap points-of-interest marking, geo-referenced to the position estimate
- One-click automated return-to-home at any point in the dive
- Historical path replay overlaid on the plan for debrief & repeat survey
Custom Route Execution
Plan and execute inspection paths and survey grids on the surface — the ROV flies them autonomously.
POI Recording
Mark points of interest with a single tap, geo-referenced to the ROV's estimated subsea position.
One-Click Home Return
Automated return-to-home at any time — critical in emergencies or when managing battery reserves.
Historical Path Replay
Replay the recorded dive overlaid on the planned route for mission debrief and repeat-survey planning.
Q-DVL & Stability Systems
In open-sea conditions, current, swell and tether drag challenge any ROV's ability to hold position. Q-DVL station lock, downward collision avoidance and altitude tracking give operators a stable platform for precision inspection and measurement.
Q-DVL Station Lock
The Doppler Velocity Log measures velocity against the seabed and feeds the flight controller — holding a precise 3D position in current. Release the controls and the ROV stays put at the inspection point.
Downward Collision Avoidance
Downward sonar continuously monitors clearance to the seabed and structures below, raising proximity alerts and limiting downward motion to protect the ROV and fragile bottom-mounted infrastructure.
Altitude Tracking
Maintains a constant height above the seabed, following contour changes as the bottom rises and falls — essential for survey transects, cable tracking and pipeline inspection.
Dual 4K UHD Cameras & 12,000-Lumen Lighting
Two independent 4K cameras give the pilot a forward navigation view and a downward inspection view at the same time — lit by the brightest LED system in the FIFISH range.
See forward and below — in one dive
The forward 4K camera is the primary navigation view, with a 166° horizontal FOV that keeps the full scene in frame on approach. The downward 4K camera documents the seabed and structure surfaces below and feeds the QY-BT mapping data stream. Each camera captures 12 MP stills, and a maximum ISO of 6,400 holds detail in the reduced-light deep environment.
Dual 4K UHD Cameras
Forward navigation and downward inspection views simultaneously — 12 MP stills from each for full-detail structural documentation.
166° / 100° Wide FOV
An ultra-wide field keeps the full scene in frame on approach manoeuvres and captures large structure sections in a single pass.
12,000-Lumen LEDs
The brightest LED system in the FIFISH range, matched to the dual-camera FOV for even illumination without shadows at structural edges.
ISO 6400 Low-Light
Maximum ISO of 6,400 captures detail in deep water beyond effective LED range, inside dark structures and where lighting cannot be positioned optimally.
Optional 2D Imaging Sonar
An optional 2D imaging sonar identifies objects and landscapes in dark or turbid water where cameras alone cannot resolve the scene.
Feeds QY-BT Mapping
The downward camera's data stream feeds bathymetric mapping, so survey-quality seabed data is collected during the same inspection dive.
See in zero-visibility water
When silt, plankton or depth defeat the cameras, the optional 2D imaging sonar lets the W6 NAVI identify objects and landscapes acoustically — keeping search, recovery and inspection work moving in dark or turbid conditions where vision-only ROVs are blind.
- Object & landscape identification in dark or turbid water
- Extends search-and-recovery range beyond camera visibility
- Complements the dual-camera system for all-conditions operation
QY-BT Bathymetric Mapping & QY-MT Measurement
The W6 NAVI builds professional 2D and 3D seafloor data during normal inspection dives, and measures structures and damage to millimetre level with the QY-MT laser scaler — two survey deliverables from one deployment.
QY-BT — Built-In Bathymetric Mapping
QY-BT generates professional 2D and 3D seafloor topographic data during normal inspection dives — colour-coded depth maps with configurable resolution and coverage. Three-dimensional models show scour holes, sediment mounds and pipeline exposure in a format clients and engineers can read without specialist GIS software, and the system can estimate reservoir and basin storage volumes from the survey data.
- 2D planimetric depth maps & 3D topographic seabed models
- Configurable map resolution and coverage area
- Reservoir & basin volume / capacity estimation
- Seabed data collected during every dive — not just dedicated survey passes
QY-MT — Millimetre-Level Measurement
The QY-MT laser scaler turns the camera feed into a measurement instrument — capturing length, width, area, perimeter and angles directly on the seabed or on a structure. Measurements are recorded with the footage for inspection reports, and pair with the bathymetric survey to produce comprehensive, documented deliverables.
- Millimetre-level length, width, area, perimeter and angle measurement
- Measurements overlaid live and recorded with the inspection footage
- Both real-time and post-dive (offline) analysis
- Combines with QY-BT survey data for complete deliverables
10 kg Payload, Modular Tooling & Removable Power
A 10 kg payload capacity and modular, multi-tool design let the W6 NAVI carry the equipment a mission needs — kept on station by a removable 388.8 Wh battery with fast turnaround.
Carry the tools the mission needs
The W6 NAVI's modular design supports multi-tool integration with swappable components, and its 10 kg payload capacity carries sonar, measurement tools, robotic arms and sensors that lighter ROVs cannot lift. One deployment can document structure, measure damage and recover objects without switching vehicles.
Modular Multi-Tool Integration
Swappable components and a modular tool interface let you fit robotic arms, sonar, measurement tools and sensors for the specific mission profile.
Removable 388.8 Wh Battery
A removable battery keeps the platform deployable across a working day — swap a depleted unit for a charged one between dives to reduce downtime.
70% Quick Charge in One Hour
Fast charging brings the battery to 70% in about one hour. An optional direct power supply is available for continuous topside-powered operation.
Where the W6 NAVI Works
350 m depth capability, a 10 kg payload, and built-in navigation and mapping make the W6 NAVI the go-to platform for maritime survey, infrastructure inspection and search operations in demanding open-water environments.
Search & Recovery
350 m reach finds targets beyond lightweight ROVs; one-click home return and autonomous navigation reduce operator workload in time-critical operations.
Large Vessel Inspection
Inspect large hulls, propellers, rudders and underwater fittings at anchor or in port — the 10 kg payload supports sonar and measurement tools at once.
Bridge & Port Structures
Survey piles, fenders, pontoon floats and jetties, with QY-BT mapping the surrounding seabed automatically during each dive.
Mooring & Anchor Inspection
Trace mooring chains, inspect anchor points and assess wear and fouling to 350 m — altitude tracking keeps the camera at consistent focal range.
Hydrographic Survey
QY-BT mapping plus U-INS navigation give repeatable coverage for seabed-change monitoring, dredging verification and chart updating.
Reservoir & Dam Inspection
Survey dam faces, reservoir floors and intake structures — QY-BT adds reservoir volume estimates alongside the structural inspection.
Q-iRC — Industrial Remote Controller
Command with power, deliver with precision. A 7-inch 1,500-nit sunlight-readable display, 8 programmable smart keys and up to 8 hours of battery in a ruggedised handheld unit.
Key Specifications
| Display | 7" Full HD |
| Brightness | 1,500 nits |
| Battery Life | Up to 8 hours |
| Smart Keys | 8 programmable |
| Processor | Next-gen octa-core |
| Connectivity | USB-C/A · Ethernet · Wi-Fi · HDMI |
☀️ Glare-Free in Direct Sunlight
1,500 nits peak brightness — fully readable on deck in bright daylight, no tent or shade required.
🎛️ 8 Programmable Smart Keys
One-tap collision avoidance, sonar view, positioning map and multi-window switching — configured for your mission.
📡 Real-Time Multi-Screen
Live camera, sonar, bathymetric map, sensor data and heading unified on one display for faster decisions.
Full Specifications
Performance & Physical ▾
| Maximum Depth | 350 metres |
| Payload Capacity | 10 kg |
| Degrees of Freedom | 6 DOF — 360° omnidirectional |
Camera System ▾
| Camera Configuration | Dual 4K UHD (forward + downward) |
| Photo Resolution | 12 megapixels (each camera) |
| Horizontal FOV | 166° |
| Vertical FOV | 100° |
| Maximum ISO | 6,400 |
Lighting ▾
| Total LED Output | 12,000 lumens |
| Coverage | Matched to dual-camera FOV |
Navigation & Autonomy ▾
| Navigation System | U-INS (deep-learning inertial nav) |
| Station Hold | Q-DVL (built-in) |
| Collision Avoidance | Downward sonar |
| Altitude Tracking | ✓ — constant seabed height mode |
| Home Return | One-click automated |
| POI Recording | ✓ — in-dive marking |
Measurement & Mapping ▾
| QY-MT | Laser scaler · millimetre-level measurement |
| QY-BT | 2D/3D bathymetric mapping · built-in · volume estimation |
| 2D Imaging Sonar | Optional — object & landscape ID in turbid water |
| Online/Offline | Both real-time and post-dive analysis |
Power ▾
| Battery Capacity | 388.8 Wh |
| Battery Type | Removable / swappable |
| Quick Charge | 70% in 1 hour |
| Direct Power (optional) | Available via direct power supply |
Specification Sheets & Brochures
Download the official QYSEA FIFISH W6 NAVI documentation — technical specifications and product brochure — sourced directly from QYSEA.
Request W6 NAVI Pricing
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Request a Quote — FIFISH W6 NAVI
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