Equinox – Towed multi-aperture side scan sonar

Mission ready; designed to support Search, Classify and Map (SCM) and Hydrographic operations
Survey more ground in a single pass; effective area coverage rate (ACR) of up to 1.6 km2/hr
Along track resolution of 0.15°; best in class delivering maximum detection rates
Co-located side-scan image and bathy improves your situational awareness
Real-time motion compensation and positioning accuracies better than 1 m DRMS
Automatically follows terrain and avoids obstacles

Improved area coverage rates and actionable data

Equinox is an integrated, towed multi aperture sonar that delivers improved area coverage rates for mine countermeasures (MCM) and hydrographic operations. It offers unrivalled stability, position accuracy and results in real-time. At its core, is our Solstice multiple aperture sonar delivering imagery of the highest quality possible from side-scan sonar enabling detection and classification of seafloor objects across the whole swath.

Equinox combines Sonardyne’s state-of-the-art SPRINT INS, Mini-Ranger 2 USBL and Solstice Multi Aperture Sonar (MAS) mounted on EIVA’s (a Sonardyne Group company) renowned ScanFish 3D, a steerable remotely operated towed vehicle (ROTV) . EIVA’s NaviSuite Kuda user interface is used to plan, autopilot and display the data in real-time. Producing stunning accurate pictures, it’s ideally suited for vessels of opportunities or unmanned surface vessels delivering hydrographic, archaeological, search, salvage, unexploded ordnance, and mine countermeasure missions.

The ScanFish 3D is a trusted ROTV and thanks to its inherent stability the ideal platform to operate Solstice from. At a total weight of 220 kg in air, Equinox can be easily mobilised on to small vessels of opportunity or unmanned surface vessels.

Unlike towed Synthetic Aperture Sonar (SAS) systems, Equinox offers an affordable lower-logistics alternative still capable of providing high area coverage rates. By combining leading navigation and positioning using our Mini-Ranger 2 USBL and SPRINT INS, imaging data is geo-referenced with an accuracy that’s unrivalled for these types of applications at this price.

Planning a mission is easy. Using NaviSuite Kuda software you can define your sailing route and run-lines by simply selecting the area you would like to cover.

During the mission, NaviSuite Kuda updates the vessel and ScanFish 3D position in real-time and continuously. Equinox also provides real-time geo-rectified waterfall, mosaics and DTM maps and the user interface tools that enable an operator to mark and process objects, including automatic target recognition using AI.

That’s not all, ScanFish 3D can carry heavier payloads and there is room in the fibre cable to include additional payload sensors such as gap fillers.

Equinox users can count on improved Probability of Detection and decreased Probability of False Alarms improving the efficiency of your mine counter-measures, archaeological, search and salvage missions.

Why Equinox


  • All-in-one, rapidly mobilised solution for MCM, SCM and hydrography
  • High stability platform with automatic terrain following
  • NaviSuite Kuda software reduces planning times and improves processing times
  • Everything supplied, including winch and 1Gbps cable

Design (Scanfish)

  • 1210 mm x 1858 mm x 1049 mm, 220 kg in air (73 kg in water)
  • Survey speeds 3 to 6 knots
  • Pitch and roll stabilised
  • Automatic altitude following


  • Depth rated to 300 m
  • Across track resolution 37.5 mm
  • Along-track resolution 0.15°
  • Geo-rectified waterfall display
  • Image resolution 30 mm x 30 mm
  • Co-located 200m swath side-scan and bathy
  • Real-time CAD/CAC option


  • What’s in the box: ScanFish 3D, NaviSuite Kuda software, cable and winch, Solstice MAS, Mini-Ranger 2 USBL, WSM 6+, SPRINT 500 INS, DVL
  • Warranty: 1 year return to Sonardyne/EIVA service centre
  • ITAR Controlled: No
  • UK Export License: TBD

More about this product

Equinox System Specifications


Feature Specification
Operational Depth Rating 300 metres
Swath 200 metres
Bathymetry Yes
Output Formats .SWF8 and .XTF
Position Accuracy Better than 1 metre (DRMS)
Pitch and Roll Stabilisation Auto
Altitude Following Auto (Fixed 7.5 metres from seafloor)
Survey Speeds 3-6 Knots
Typical Tether Out Constant at 3-5 x depth (depending on the environment)
Fibre Telemetry 1 Gb/s
Payload Other sensors can also be mounted
Software NaviSuite Kuda (autopilot, runlines, real-time display and mosaics)
CAD/CAC NaviSuite Deep Learning
Physical Specification
Dimensions (Length x Width x Height) 1210 x 1858 x 1049 mm
Weight in Air/Water* 220/73 kg

For more information on Scanfish, please visit the EIVA website, a Sonardyne Group company.

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