South AQUA M20 PRO Unmanned Survey Vessel

Product information:

- - Heavy-Duty Performance: Designed for large-scale surveys in rivers, lakes, and coastal waters
  - Enhanced Dual Moon Pool Design: Supports simultaneous deployment of multiple high-end instruments, including multi-beam echo sounders, ADCPs, and side-scan sonars
  - Industrial-Grade Dual GNSS System: Provides centimeter-level positioning and stable orientation
  - Advanced Obstacle Avoidance: Equipped with high-precision millimeter-wave radar and intelligent route planning
  - Full Autonomous Operation: Supports precise cross-section tracking, adaptive speed control, and return-to-base functions for low battery or signal loss
  - 360° Real-Time Video Monitoring: Ensures complete situational awareness during missions
  - Rugged & Reliable Hull: Anti-sinking, anti-collision dual-layer construction for tough field conditions
  - Integrated Survey Software Suite: Includes powerful, professional-grade software for mission planning, navigation control, and data processing

Category Marine System Tags Echo Sounder, Marine survey, USV Brand: SOUTH

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NEW DESIGN

Diversion and anti-interference, weight reduction and anti-collision, double protection The hull is made of a new generation of carbon fiber composite materials, which makes the hull lighter and more impact-resistant. It is also equipped with a new diversion design to resist interference. The new double-layer hull structure has removable anti-collision strips to improve durability.

Real-Time System Monitoring for Accurate Hydrographic Surveys

Intelligent Self-Diagnostics & Measurement Assistance

The M20 PRO is equipped with an advanced temperature and humidity sensing system that enables real-time health monitoring of critical onboard components. This intelligent self-checking function ensures safe and stable operation by detecting potential issues early. Temperature data is transmitted live to the software, allowing for automatic analysis and adjustment of sound velocity parameters—significantly enhancing the accuracy and reliability of depth measurements.

Next-Generation Data Link

Enhanced Signal Strength & Reliable Transmission

The M20 PRO features a next-generation data link that significantly boosts communication bandwidth and signal integrity. Designed for challenging environments, it ensures stable, high-speed data transmission—even in complex or interference-prone survey conditions.

Upgraded Propulsion System

High Power, Greater Thrust, Extended Durability

The M20 PRO is equipped with a powerful propulsion system featuring single motors rated up to 1100W, enabling speeds of up to 7 m/s and resistance to water flow rates up to 3 m/s. A triple-layer waterproof design enhances motor longevity and reliability, ensuring consistent performance in demanding survey environments.

Expanded Moon Pool Design

Greater Capacity, Broader Compatibility, Precision Fit

The M20 PRO features a redesigned, larger-capacity moon pool for increased adaptability and seamless integration of advanced survey instruments. It comes standard with a high-precision depth sounder and supports full compatibility with complete range of hydrological sensors, as well as most mainstream instruments on the market. The expanded design is ideal for accommodating complex equipment such as ADCPs, compact multi-beam echo sounders, and shallow layer profilers.

SPECIFICATIONS

Index	Parameters
Hull
Hull size	1180mm630mm430mm(lengthwidthheight)
Hull material	Nano carbon fiber, Kevlar high strength composite materials
Hull shape	M-type flow guide design
Hull dead weight	10.8kg
Hull load	42kg
Waterproof and dustproof	IP67
Moon pool aperture	24cm
Wind and wave resistance level	Level 3 wind, level 2 wave
Supported equipment	Built-in depth sounder, can carry mainstream ADCP/water quality monitoring, sampling equipment/shallow profiling/side scan/multi-beam at home and abroad
Safety protection design	l Intelligent self-check l Equipped with detachable anti-collision strips and double-layer hull anti-sinking design l Digital power display on the hull, supporting temperature and humidity detection l Shallow water warning and automatic reverse driving l 360° HD infrared night vision camera l Dual indicator lights display the ship’s operating status and positioning signal status l Motor embedded duct installation design and equipped with waterproof grass cover l Millimeter-wave radar autonomous obstacle avoidance (obstacle avoidance distance 0.2~40m, pitchazimuth 14°112°, supports detection and tracking of up to 128 targets at the same time) l Detachable side wings to improve wind and wave resistance
Power
Power mode	Electric drive
Battery Specifications	33V/50Ah high-performance ternary lithium battery, portable design, intelligent management, pluggable and replaceable, with power display
Motor Type	High-efficiency ducted long-life brushless motor, three-level waterproof
Steering method	No servo differential steering, can reverse
Installation	Modular plug-in design, easy to disassemble and replace, waterproof
Motor power	Single motor 1100W
Maximum speed	7m/s (adapt to maximum flow rate of 3m/s)
Battery life	6h@2m/s (single battery, optional extra-long battery life of more than 12h)
Communication
SIM card	Supports eSIM and Nano card
communication	4G full network access, bridge, 2.4GHz radio
Communication distance	Intelligent remote control 2.5 kilometers, 4G unlimited distance
Main control design	Integrated main control design
Data storage	Multi-channel storage, remote control, ship end, server can all store
Main control waterproof	IP67
Remote Control	13.2-inch industrial-grade sunlight-visible high-definition display, supports different storage spaces, can control the hull, collect data, view videos, and switch working modes
Software
Control acquisition software	1) Supports measurement mission planning, autonomous navigation, hull operation control, task progress statistics, and coordinate system input 2) Supports real-time viewing of hull navigation trajectory, bathymetric data, waveforms, and videos from multiple angles 3) Can realize multi-channel data storage: local storage, hull storage, and server storage 4) Can set automatic return when low battery is low, automatic return when connection is lost, and can set the return point 5) Can automatically hover and adapt to flow velocity changes according to the measurement line 6) Can set different measurement modes according to the equipment on board 7) Supports real-time measurement and automatic adjustment of sound velocity
Data post-processing software	1) Support data playback, waveform water depth data superposition, water depth data correction, tide data correction, data delay correction, attitude correction, coordinate parameter conversion 2) Can resample the collected data according to time and distance 3) Can customize the output data output format, can display different depths in different colors 4) With rollback and undo functions 5) Support PPK post-processing solution
Results data mapping software	Supports the compilation of engineering construction drawings, survey plan line mapping, water depth measurement data display points, water depth map compilation, isobath drawing, underwater 3D topographic map drawing, water depth frame compilation, channel section drawing and earthwork calculation, etc.
Updates and Upgrades	Support online push of software and main control firmware
Position
antenna	The hull has built-in high-precision positioning and directional GNSS dual antennas, supporting CORS and radio modes
Radio Protocol	SOUTH,TRIMTALK450S,TRIMMARKI, TRANSEOT,HI-TARGET,CHC,SATEL
Satellite system	Support BDS-3 global signal, BDS-2, GPS, GLONASS, Galileo, IRNSS, QZSS, SBAS support L-Band, support Beidou accuracy (single Beidou version is optional)
Number of channels	1598
Cold Start	<30s
Lost lock and recapture	<1s
RTK initialization time	<5s
Speed measurement accuracy	0.02m/s
Standard single point accuracy	H ≤ 1.5m, V ≤ 2.5m
PPP Beidou accuracy (optional)	Better than 10CM
RTK accuracy	H: ±(8+10 ^-6 ×D)mm, D is the baseline length (unit: km) V: ±(15+10 ^-6 ×D)mm, D is the baseline length (unit: km)
Directional accuracy	0.15°@1m baseline
Inertial navigation accuracy	1) Support integrated navigation, support 1PPS 2) Attitude accuracy 0.25° 3) 6°/h (20s accuracy attenuation 1m) 4) IMU update rate up to 200Hz
Depth
Standard depth sounder	Working frequency 200kHz; beam angle 5°

* This information is for reference only. In order to continuously improve product performance, all pictures and performance parameters in this brochure are subject to change without prior notice. Thank you for your understanding!

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