Tracking, Navigation, Positioning and Communication Sensors for AUV, ROV, USV

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ROV Positioning SolutionsSonardyne is a leading global provider of marine acoustic, inertial, optical and sonar technologies for tracking, communication, and positioning of surface and underwater unmanned robotic platforms, such as USVs, AUVs, and ROVs.

Our products equip surface and subsea unmanned and autonomous platforms (unmanned surface vehicles, autonomous underwater vehicles, remotely operated vehicles) to undertake a wide variety of missions, including military, exploration, surveying, and oil & gas.

In addition to a wide range of off-the-shelf and OEM underwater equipment, we also provide a complete custom engineering service for clients’ unique subsea projects.  Based on over 40 years of subsea experience, our team will handle design, prototyping, manufacture, testing and training. Please get in touch with your requirements.

OEM & Custom Instruments

AvTrak 6 OEM Tracking & Communications Module

Accurate AUV Tracking & Communications

AvTrak 6 AUV Transponder ModuleDesigned for 12 and 21 inch class AUVs, the AvTrak 6 combines a USBL transponder, LBL transceiver and modem into one low-power unit that provides absolute position reference data for AUV inertial navigation systems (INS). The unit is capable of broadcasting robust telemetry for AUV to vessel and AUV to AUV communications.

The instrument is available in different configurations, with integral or remote transducer options, directional transducer and high power (HP) variants, and depth ratings of up to 7000m. An OEM version is available without housing, for integration into existing equipment.

Nano AvTrak 6 OEM Integrated Tracking System

Miniature transceiver for small AUVs & ROVs

Nano AvTrak 6 OEM AUV Tracking SystemThe Nano AvTrak 6 OEM is specially designed for smaller unmanned underwater vehicles such as ROVs and AUVs. Providing many of the features supported by the larger AvTrak 6 transceiver, the system has a depth rating of up to 995m and features an integrated Li-ion rechargeable battery that provides up to 10 days emergency standby life for extended relocation and recovery opportunities.

The Nano AvTrak 6 OEM is compatible with Sonardyne’s Mini-Ranger 2 6G Wideband USBL system and supports the standard 6G command language as well as Sonardyne’s Messaging Service (SMS) telemetry, thus providing an integrated navigation and data link vehicle solution in a single instrument.

Subsea Navigation Sensors

Syrinx Subsea Doppler Velocity Log

High accuracy navigation for AUVs & ROVs

Syrinx Doppler Velocity LogThe Syrinx Doppler Velocity Log (DVL) is a 600 kHz system designed for both unmanned surface and subsurface vehicles that can be used as a standalone DVL, as part of an integrated system, or perform both functions at once. This dual capability means that only one DVL/altitude sensor is required for both ROV control and survey crews, saving on cost and payload space.

Syrinx can be integrated with Sonardyne’s SPRINT INS to provide superior DVL-aided navigation, with enhanced velocity prediction and redundant positioning capability. Syrinx also features a robust low-altitude mode that provides high accuracy and high output rates even when operating at altitudes of less than 1m.

Syrinx is supplied with a 4000m-rated titanium housing as standard, with 3000m, 6000m, and OEM (no housing) versions also available.

SPRINT Subsea Inertial Navigation System

Survey quality navigation for ROVs & AUVs


Ideal for ROVs and AUVs, the SPRINT is an acoustically-aided subsea Inertial Navigation System (INS) that optimally processes data from USBL, LBL positioning, Doppler Velocity Log and pressure sensors to improve position accuracy, precision, reliability and integrity.

Combining an AHRS (Attitude Heading Reference System) with an AAINS (Acoustically Aided Inertial Navigation System) allows inertial navigation to start or restart instantaneously on receipt of a position update, avoiding a lengthy alignment period.

The SPRINT hardware platform maintains a rolling 15 day backup of all real time navigation and raw data on an onboard SD card.

SPRINT-Nav Subsea Navigation Sensors

Combined INS and DVL for accurate ROV navigation

SPRINT-Nav Family of Subsea Navigation Systems

SPRINT-Nav is an all-in-one system that combines the SPRINT INS sensor and Syrinx 600 kHz Doppler Velocity Log with a high-accuracy intelligent pressure sensor to provide high-performance subsea navigation for underwater unmanned vehicles. It is available in three different performance levels as well as two different depth ratings of 4000 and 6000 metres.

SPRINT-Nav Mini is an ultra-compact hybrid acoustic-inertial navigation system that is ideal for observation-class and work-class ROVs as well as unmanned underwater vehicles operating in GPS-denied environments.

Using the same proven algorithms as the larger members of the SPRINT-Nav family, the SPRINT-Nav Mini tightly fuses its sensor outputs to provide high-precision orientation, velocity, altitude and depth data. The single compact unit replaces the need for AHRS, DVL and pressure sensors, with less cabling, fewer connectors and simpler operation.

SPRINT-Nav Mini is available as either a 300 metre or 4000 metre depth rated unit.

Comparison & Specifications:

(300 METRES)SPRINT-Nav Mini 300m
(4,000 METRES)SPRINT-Nav Mini 4000m