Micro-Ranger 2 USBL- Underwater Target Tracking

Tracks every move of your divers and underwater robots as they explore rivers, lakes, reservoirs, harbours and coastal water
Never used a USBL system before? No problem. Micro-Ranger 2 is simple to setup and use
Deploy it from a dockside, RIB or even from unmanned surface vessel; no special hardware needed
Up to 995 m range; no need for an export license to transport internationally

Need to know where your targets are? Micro-Ranger 2 has them covered.

It maybe our smallest ever underwater tracking system, but Micro-Ranger 2 will have a big impact upon your Search and Rescue, inspection and survey operations. Precision, ease of use and versatility come as standard – and its small enough to use with divers and the smallest ROVs

Portable and quick to mobilise, Micro-Ranger 2 can be used from any waterside location or vessel, including RHIBs and small survey vessels, to track divers, remote and autonomous underwater vehicles and equipment. It’s built around the same market-leading 6G hardware and Wideband 2 digital acoustic technology you’ll find in our family of deep water USBL systems, Mini-Ranger 2 and Ranger 2, but for significantly less cost and complexity.

Everything needed to start tracking divers, remotely operated vehicles, autonomous underwater vehicles or any other subsea targets is contained in a single, IP67-rated ruggedised case small enough to operate-anywhere, from anything.

The one-box USBL solution is able to track up to 10 targets out to 995 m meaning export-free ownership. Inside the case is a Micro-Ranger Transceiver (MRT) with 10 m of cable, a GNSS antenna with 5 m of cable, and two Nano transponders and command hub. A built-in battery provides more than 10 hours of continuous use, enough for a full day of activity out on the water. The case can also accept external power from your boat or shore supply.

To get started, you simply have to connect your laptop running Ranger 2 software to the case via Wi-Fi, put the MRT in the water, connect the antenna, and fit a Nano to each target. First-time operators can expect to be up and running in around 30 minutes.

Nano transponders are the perfect size and weight for divers, small towfish and micro ROVs. The two that come in the case are our second-generation model, offering extended battery life and depth rating. A connector-equipped Nano is also available allowing it to operate continuously via an external power source. Choose the type of Nano transponder required at time of ordering.

Micro-Ranger 2 software comes with a lot of advanced and powerful features selected from our Mini-Ranger 2 and Ranger 2 USBL systems to ensure you have everything you need to track underwater targets. If you need to track and also communicate with small AUVs and drones, an Integrator Kit is available. This kit replaces the Nanos with an AvTrak 6 Nano. It is also provided with an integration guide to ensure that integrating our acoustics into your AUV operations is seamless.



  • Portable, everything you need comes in one box
  • Quick to connect up and deploy
  • Easy to use, no training needed
  • Shares common platform with other Sonardyne USBLs


  • MF frequency (19–34 kHz)
  • Sonardyne Wideband 2 acoustics for reliable performance in shallow water
  • Supports Sonardyne Messaging Service for data exchange (200 to 9,000 bps)
  • Omni-directional coverage for wide area tracking


  • Up to 5% of slant range system accuracy
  • Up 10 targets tracked, sequentially
  • 995 m maximum tracking range
  • 3 Hz position update rate


  • What’s in the box: Command hub, cabled MRT, cabled GNSS antenna, 2 x Nano transponders (NFC type as standard), Nano charger, Windows software (PC not supplied)
  • Warranty: 1 year return to Sonardyne service centre
  • ITAR Controlled: No
  • UK Export License: Not required

More about this product

Micro-Ranger 2 Specification

Micro-Ranger 2 Mini-Ranger 2 Ranger 2
Where to use it: Inland, Inshore Where to use it: Nearshore Where to use it: Offshore
What to use it for: Tracking, Commanding and releasing RT 6 acoustic releases What to use it for: Tracking, Data harvesting, Commanding and releasing RT 6 acoustic releases What to use it for: Tracking, Commanding and releasing RT 6 acoustic releases
Operating platform: Dockside, RHIB, Small boat, Small USV Operating platform: Survey boat, Moored barge, USV, Small ship Operating platform: USV, Large ship
Typical installation: Temporary Typical installation: Temporary Typical installation: Permanent
Expected System Accuracy: Up to 5% of slant range Expected System Accuracy: Up to 1.3% of slant range Expected System Accuracy: Up to 0.04% of slant range
Maximum Range: Up to 995 m Maximum Range: Up to 4,000 m Maximum Range: Up to 11,000 m
Maximum Targets Tracked: Up to 10 in sequence Maximum Targets Tracked: Up to 10 simultaneously Maximum Targets Tracked: Up to 99
Maximum Update Rate: 3 Hz Maximum Update Rate: 3 Hz Maximum Update Rate: 1 Hz
Feature Expansion Packs: Yes Feature Expansion Packs: Yes Feature Expansion Packs: Yes



Software Version  
Micro-Ranger 2 V6.03.04 (Can only be installed on a PC running Windows® 10 OS and only supports Sonardyne 6G equipment)
V6.03.03 (Can only be installed on a PC running Windows® 10 OS and only supports Sonardyne 6G equipment)
V6.02.03 (Can only be installed on a PC running Windows® 7 OS and only supports Sonardyne 6G equipment)
V4.06.03 (Can only be installed on a PC running Windows® 7 OS and supports 5G and Sonardyne 6G equipment)


Technical Bulletins

Title Description
Important Security Features of the Marksman/Ranger2 Navigation Computer – No 11-003 The latest Windows XP Image (8026-051-A/B) on the Marksman / Ranger2 Navigation Computer has additional security features to minimise the risk of virus infections and system tampering. These include pre-installed antivirus software and a dual login feature. Note that this does not affect the NavPCs used for any other software products.
Marksman/Ranger 2 V3.01 CASIUS Processing Error – TB12-001 Marksman/Ranger 2 pitch/roll/heading measurements imported into CASIUS have an offset. When a .CAS file is saved by CASIUS, the resulting file contains the wrong pitch/roll/heading measurements. A fixed angular offset is added to the transceiver pitch/roll/heading corrections, leading to a shift in beacon positions, depending on water depth. A spin test would reveal the offset.



Title Description
Ranger 2 USBL Operator Training Course. Course details

This course provides the basic theory together with a thorough practical understanding of the operation of Sonardyne’s Ranger 2 Ultra-Short BaseLine (USBL) acoustic positioning system. Using both simulators and live in-water systems (Plymouth UK or Customer Vessel only) the course covers all aspects USBL positioning from system configuration through to tracking. Additional 0.5 Day practical CASIUS module available on request. This practical 2-day course is delivered at our in-water training facility in Plymouth, UK, at any of our regional offices (Aberdeen, UK; Singapore; Houston, USA; Rio Das Ostras, Brazil) or at customer site/vessel. Click here for planned course dates and booking information.

  General Training Information

Software Compatibility


To request a manual simply tick the box next to the manual you require and then press the Request Form button. You will then be able to request addition manuals for other products and your request will be emailed to our Customer Support Team who will reply to your enquiry. Alternatively please contact your local office who will be more than happy to help.

User Manual - Micro-Ranger 2
QSG - Micro-Ranger 2

  • Manuals Request

    Marine Robotics Integrator Kit for AUV Developers

    If you are an AUV developer then be sure to ask for our Micro-Ranger 2 Marine Robotics Integrator Kit which includes our Marine Robotics Pack software and our popular AvTrak 6 Nano transceiver for your vehicle, as well as a handy integration guide to help you unlock all our tracking and communication functionality. Learn how to interrogate your vehicle and transfer data at rates ranging from 200 to 9000 bps. Transform and add value to your AUV.


    How do I deploy my MRT?

    Here’s our top-tips on how to deploy your Micro-Ranger Transceiver quickly and easily.

    Please take care when working near water, and make sure all bolts are securely tightened before deployment.

    Download the adapter plate drawing here: https://www.sonardyne.com/app/uploads… *Disclaimer* Sonardyne accepts no responsibility for failures of adapter plates not manufactured by Sonardyne

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