Multi-functional Underwater Sonar Search and Rescue System

Complete Technical Parameters & Industry Application Fields

1. System Composition

• Main control display terminal (waterproof high-brightness host)
• Multi-frequency CHIRP sonar transducer (integrated forward-looking, side-scan and down-scan)
• Underwater high-definition camera pan-tilt with fill light
• GPS/Inertial navigation positioning module
• Waterproof cables, tow fish and ROV underwater carrier
• Lithium battery power supply, data storage and AI target recognition software

2. General Core Technical Parameters (Mainstream Industrial Search & Rescue Standard)

2.1 Sonar Detection Performance

• Adjustable operating frequencies: 50kHz/83kHz/200kHz/455kHz/800kHz/1200kHz. Low frequencies for long-distance scanning; high frequencies for high-definition near-range imaging.
• Scanning modes: Side-scan 2D landform mapping, down-scan bathymetric profiling, 360° panoramic forward-looking multi-beam imaging, and CHIRP linear frequency modulation noise reduction.
• Detection range
  • Handheld portable model: Radius adjustable in 3 gears (10m/20m/50m), coverage range 2m to 50m, 180° sector scanning.
  • Vessel-mounted side-scan model: Maximum single-side coverage 180–600m; standard maximum operating water depth 300m (up to 2000m for deep-sea professional version).
  • ROV-integrated multi-beam model: Effective viewing distance 40–120m, 512-beam high-definition imaging.
• Scanning efficiency: Approximately 87 square meters per second in long-range mode. A full 180° scan takes 30 to 45 seconds, covering 8,000 square meters of water area within 5 minutes.
• Target recognition: Built-in AI for automatic marking of human figures, vehicles, hulls, sunken ships and pipelines. It displays real-time target distance, water depth, azimuth and GPS coordinates.
• Resolution: Centimeter-level imaging under high-frequency mode, capable of identifying human bodies, fallen mobile phones and small metal debris.

2.2 Auxiliary Underwater Video Module (Re-verification for Turbid Water)

• Camera: 1080P/4K high-definition underwater camera with 360° electric rotating pan-tilt.
• Lighting: 5000LM dimmable high-power LED night vision fill light.
• Underwater visibility: 2–5m in clear water, 0.5–1.5m in heavily turbid water, serving as an auxiliary verification tool for sonar imaging.
• Maximum diving depth: 20–300m (varies by model).

2.3 Terminal & Electrical Parameters

• Display screen: 7/9-inch IPS high-brightness screen with 1200 nits for clear visibility under direct sunlight. Supports quad-view and six-view simultaneous display of sonar images, videos, maps and data.
• Operating system: Full Chinese interface with customizable shortcut keys. Real-time water temperature, water depth and longitude/latitude overlay available.
• Positioning system: Combined GPS, Beidou and WAAS differential positioning. Built-in electronic nautical chart with one-click positioning and coordinate saving for targets.
• Waterproof rating: Main unit IP67; underwater transducer, tow fish and ROV IP68 fully waterproof.
• Power supply: 12V DC lithium battery. Single battery lasts 4–8 hours. Supports external power supply from vessel mains.
• Operating environment: Working temperature -20℃ to +55℃. Applicable to icy water, flood sewage, offshore salt water and reservoir fresh water.
• Data functions: Full recording, playback and export of sonar videos. 4G and Bluetooth wireless transmission supported.

2.4 Parameter Comparison of Portable, Vessel-mounted and ROV Models

3. Core Features

• Operation in fully turbid water: Normal operation unaffected by sediment, flood sewage, darkness and night conditions. The sonar works independently when visual cameras fail.
• Multi-modal composite detection: Conduct large-area preliminary scanning via sonar to lock suspicious areas, then perform close-range verification with underwater videos, greatly reducing risks for divers.
• Full-area 3D mapping: Automatically generate underwater terrain profiles to identify deep pits, undercurrents, underwater obstacles and sunken vehicles.
• Multi-target storage and positioning: Mark multiple targets including drowning persons, vessels, wrecks and pipelines in batches, and export coordinates for salvage operations.
• Anti-interference design: Filter out clutter from water plants, silt and water flow to reduce false alarms caused by floating debris in floods.

4. Application Industries & Scenarios

4.1 Emergency Rescue & Public Security (Core Application)

Fire and Rescue Teams

• Search and rescue for people trapped in urban waterlogging, flooded roads and submerged underground garages.
• Salvage of drowning persons in rivers, reservoirs and ponds.
• Underwater search for people falling through ice in frozen lakes in winter.
• Location of missing persons and vehicles in mountain floods and barrier lakes.

Special Police & Water Police Stations

• Positioning and salvage of physical evidence such as mobile phones, weapons and vehicles related to drowning cases.
• Comprehensive investigation for missing persons in rivers and offshore waters.

Maritime and Coast Guard Law Enforcement

• Search and rescue for crew members from distressed offshore vessels.
• Detection of sunken ships, smuggling boats and underwater contraband.
• Underwater evidence investigation for maritime traffic accidents.

Civil Water Rescue Teams & Lifespan Associations

• Regular rapid search and rescue in scenic lakes and natural rivers.

4.2 Water Conservancy & Hydropower Industry

• Inspection of defects, cracks and scouring pits on dam bodies and foundations.
• Underwater terrain mapping and removal of sunken vessels and debris before river dredging.
• Inspection of foreign objects at water pump stations, water intakes and sluice gates to prevent equipment blockage.
• Regular safety patrols for missing vessels and personnel in reservoir areas.

4.3 Marine Engineering & Waterway Operation and Maintenance

• Detection of underwater obstacles, sunken objects and riprap in ports, wharves and waterways.
• Inspection of damage, exposure and displacement of submarine pipelines, cables and oil pipelines.
• Detection of scouring and cavities around pile foundations of bridge piers and cross-sea bridges.
• Underwater terrain mapping before waterway dredging and positioning for sunken wreck removal.

4.4 Underwater Salvage & Engineering Service Industry

• Pre-scanning for professional salvage of vehicles falling into rivers, crashed aircraft and sunken ships.
• Search for valuable underwater equipment, vessel parts and lost valuables.
• Safety inspection of cofferdams and underwater construction areas to avoid diving hazards.

4.5 Underwater Archaeology & Cultural Tourism Exploration

• Detection of ancient underwater ruins, sunken ships and cultural relics in inland ancient river courses and lakes.
• Large-scale scanning and mapping of ancient merchant ships and underwater heritage sites in offshore waters.

4.6 Military & Border Defense

• Surveillance of suspicious underwater targets in border rivers and offshore waters.
• Detection of underwater obstacles and small underwater vehicles in military waters.
• Auxiliary search and rescue system for naval vessels.

4.7 Other Application Scenarios

• Environmental protection & water services: Detection of foreign objects and structural inspection in sewage plants, deep wells and drainage rivers.
• Inspection of underwater equipment in cooling pools of nuclear power plants and chemical plants.
• Fishery management: Inspection of illegal fishing nets and sunken aquaculture facilities in reservoirs.

5. Typical Operation Process

1. Deploy the sonar system on vessels or shore, and start long-range full-area scanning with side-scan mode.
2. The AI system automatically marks and highlights suspicious targets and saves GPS coordinates.
3. Switch to forward-looking multi-beam mode to narrow down the search range, and enable high-frequency mode for high-definition imaging.
4. Lower the underwater camera probe to verify and confirm targets such as human bodies, vehicles and wrecks.
5. Export target coordinates to guide divers and salvage vessels to carry out precise operations.