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Subsea Europe Services GmbH Sonardyne Mini-Ranger 2

USBL tracking of Diver, AUV, ROV, towfish or USV, without the complexity of full-sized systems

Mini-Ranger 2 is Sonardyne's mid-level USBL target tracking system that’s also able to support data USV harvesting from seabed-deployed instruments or communicating with underwater assets such as AUVs.

  • Subsea Europe Services GmbH Sonardyne Mini-Ranger 2
Subsea Europe Services GmbH
Verbindungsweg 40
25469 Halstenbek
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With a 995 m operating range, extendable to 4,000 m, Mini-Ranger 2 can track up to 10 underwater targets simultaneously, including divers, towed instruments, ROVs and AUVs. An optional Marine Robotics software pack enables communication with targets – enabling for example, data harvesting from seafloor instrument packages using an uncrewed surface vessel (USV).

Mini-Ranger 2 is a compact, easy-to-install and use system, so it’s the ideal choice for temporary deployment on small survey vessels, as well as uncrewed surface vessels (USVs). It’s built around the same market-leading 6G hardware and Wideband 2 digital acoustic technology you’ll find in our entire family of USBL systems – even the software is the same.

  • Performance without the cost and complexity of a deep water USBL solution
  • Perfect for nearshore operations; UXO surveys, search and recovery, structure inspection
  • Portable and quick to mobilise; a great choice for small survey vessels, moored barges and uncrewed vessels
  • 995 m operating range; extendable to 4,000 m (requires export license)
  • Optional Marine Robotics software feature pack provides command and control of AUVs
  • Works with a wide range of 6G transponders including RT 6 acoustic releases


HPT 3000

At the heart of the system is HPT 3000, a highly capable surface-deployed USBL transceiver optimised for performance in shallow water, high elevation and long lay back operating scenarios, as well data telemetry. HPT 3000 is connected to the system’s 1U-high Ethernet Serial Hub (ESH) and your PC running the Ranger 2 software application. Fit a transponder to each target you want to track and you’re ready to get your operation underway.


Transponder options

A wide range of Sonardyne 6G transponders can be used with Mini-Ranger 2, allowing you to select the most appropriate model for each task. If you’re tracking divers, man-portable AUVs and micro-class ROVs, Nano is a popular choice. When tracking larger targets such as a towfish, a crane wire lowering a structure, or an observation-class ROV, WSM 6+ will meet your requirements. And if you’re looking for a combined tracking and acoustic release transponder, RT 6 is now available. It allows you to deploy, track and recover seafloor equipment, all using the same instrument.


The Sonardyne Mini-Ranger 2 is used for diverse applications including:

  • Environmental surveys
  • Autonomous Underwater Vehicles
  • Aquaculture
  • Coastal science
  • Sensor tracking
  • Research vessels
  • Site survey and characterisation
  • Naval test ranges
  • Military diving
  • Uncrewed Surface Vehicles
  • Remotely Operated Vehicles
  • Tracking and communications



Design Powerful features for commercial users
  Easy to transport, hardware comes in one box
  Configurable for manned or unmanned vessel operations
  Quick to mobilise, configure and uninstall
  Shares common platform with other Sonardyne USBLs
Performance 0.2% positioning repeatability using external MRU
  1.3% positioning repeatability using internal MRU
  Up 10 targets tracked, simultaneously
  995 m tracking range; extendable to 4,000 m
  3 Hz position update rate
Acoustics MF frequency (19–34 kHz)
  Sonardyne Wideband 2 digital acoustics for reliable performance in both shallow and deep environments
  Supports Sonardyne Messaging Service for data exchange
  Transceiver optimised for high elevation tracking


  • Select your region
  • Select your application area
    Habitat Mapping, Hydrography, Infrastructure, Offshore Renewables, Oil & Gas, Diving
  • Select your category
    Positioning Transponders, USBLs and SSBLs, Underwater Acoustic Modems

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