
Q-DVL | Sonar Array
Beyond Integration, Deep Fusion Enabled
Q-DVL is a fully self-developed sonar sensor module by QYSEA Technology, designed based on the principles of the Doppler Shift effect. Seamlessly integrated with FIFISH ROVs and proprietary AI algorithms, it transcends the limitations of traditional sonar technology and design. By achieving deep integration of hardware and software, Q-DVL redefines the boundaries of DVL applications, delivering diverse solutions to tackle key marine industry inspections and operations.

Deep Fusion of Hardware & Software
Beyond Traditional Boundaries
Powered by advanced deep learning neural networks, QYSEA Technology integrates its proprietary Q-DVL with data from the ROV’s accelerometer, depth sensor, magnetometer, and gyroscope. This synergy equips FIFISH ROVs with key capabilities including U-INS (Underwater Inertial Navigation System), Station Lock Hovering, smart collision avoidance, real-time distance and altitude lock. By pushing beyond the limits of traditional underwater operations, FIFISH redefines what’s possible across a range of subsea applications.

Pioneer Tri-beam Inline Q-DVL
Next-Generation Underwater Sonar Technology
QYSEA Technology's globally pioneering Tri-beam Q-DVL Inline, is designed with a fluid-inspired concept, breaking free from the traditional limitations of DVL form. Equipped with integrated speed and distance measurement capabilities, it seamlessly merges data from IMU and multiple sensors. This innovation enhances the autonomy and agility of underwater robots, elevating navigation, positioning, and operational performance to new heights across vertical underwater structures and complex subsea environments.

Innovative Four-beam Q-DVL
Seamlessly Adapted for Diverse ROV Models
With advanced manufacturing processes, QYSEA has significantly enhanced the Downward Q-DVL’s station lock and hover capability in underwater robot applications. With its fully independent development, the Downward Q-DVL sensors are deeply compatible with multiple FIFISH ROV models, delivering innovative capabilities that redefine underwater operations.
Multi-Dimensional U-INS
(Underwater Inertial Navigation System)
Pioneering a New Era of Precise Inspections
QYSEA’s Underwater Inertial Navigation System (U-INS) is a ground-breaking omnidirectional navigation solution independently developed by QYSEA, combining advanced hardware and software integration. When paired with the Forward Inline Q-DVL for navigation, the Downward Q-DVL delivers robust current resistance and tracking capabilities. This innovative combination enables route planning, custom points-of-interesting, and much more, ushering in a new era of autonomous, flexible, and highly efficient underwater cruising.
Subsea Mission Planning
Customizable
Points-of-interest (POI)
Intelligent One-Key
Return Home
Multi-Dimensional U-INS
Vertical & Curved Surface U-INS
(Forward Q-DVL)
Bottom Surface U-INS
(Downward Q-DVL)
By integrating the Downward Q-DVL, the FIFISH ROV enables precise navigation and path planning across flat terrains such as sea beds, riverbeds, and lakebeds.
Precise Station Lock Hovering
360° Omnidirectional Station Lock Hovering
Without Dead Angles
Utilizing advanced manufacturing processes, the Q-DVL achieves high-precision, long-duration underwater hovering, offering a maximum detection range of 100 meters and centimeter-level hovering accuracy. Additionally, its 360° omnidirectional adaptive current resistance ensures full-range underwater stability, free of blind spots, for reliable and precise operations in any environment.
Smart Collision Avoidance
Ensuring Safety in
Complex Operating Environments.
The Forward Inline Q-DVL and Downward Q-DVL are equipped with intelligent collision avoidance capabilities. Utilizing distance data from both directions, combined with AI algorithms, the system accurately identifies collision risks, significantly enhancing the safety and reliability of ROV operations in challenging underwater environments.
Real-time Distance & Altitude Lock
Effortlessly Meet the Demands of Precise Tasks
Equipped with QYSEA’s Forward Inline Q-DVL and Downward Q-DVL, combined with AI algorithm assistance, the ROV achieves simultaneous distance and altitude locking capabilities. This significantly enhances task execution and inspection efficiency across diverse marine operational scenarios.