Sonardyne ROVNav 6+

ROVNav 6+ is a 6G® Wideband®3 and Wideband 2 ranging LBL ROV Transceiver and telemetry transceiver specifically designed for installation on work class ROVs


The support for Sonardyne Wideband 3 enables ROVNav 6+ to operate with our latest Compatt technology, Compatt 6+. In turn, it means ROVNav 6+ fully supports the latest Fusion 2 LBL and SPRINT INS software.

Its compatibility with Wideband®3 and Wideband®2 telemetry commands, and support of high power Wideband 2 ranging protocols, proven for their accuracy and robustness, means the ROVNav 6+ offers improved range and acoustic performance in challenging conditions such as on noisy vehicles or in multipath environments.

ROVNav 6+ is also a fully functional USBL responder or transponder, compatible with Wideband 2 USBL systems and HPR400. The internal li-ion rechargeable battery pack also enables emergency transponder mode, so if the umbilical and therefore power is cut to the ROV it can still be located by USBL.

The omni-directional remote MF transducer makes installation on an ROV easy. ROVNav 6+ is designed to be rugged and relatively lightweight, and utilises robust underwater connectors. ROVNav 6+ supports a range of internal sensors including: strain gauge pressure, PRT temperature and MEMS based inclinometer.

ROVNav 6+ is also fully compatible with our modem and logging equipment such as AMT and Fetch products, allowing it to be used to retrieve data or configure logging regimes. It supports all of our Wideband 2 and Wideband 3 spread spectrum acoustic communication; 100 to 9000 bps data rates can be selected depending on the environment.

Sensor options include a Digiquartz pressure sensor, precision inclinometer and altimeter interface. This provides a fully featured ROV manipulator deployable tool/sensor pack for a range of different applications including metrology, bathy survey and structure deployment operations, without the requirement for any additional interfacing on the ROV.

Technical information

Feature 8340-3161 8340-5261 8340-7261
Depth Rating 3,000 Metres 5,000 Metres 7,000 Metres
Operating Frequency MF (19–34 kHz)
Transducer Beam Shape Omni-Directional
Transmit Source Level (dB re 1 µPa @ 1 m) 187–196 dB (4 Levels)
Tone Equivalent Energy (TEE)* 193–202 dB
Receiver Sensitivity (dB re 1 µPa) 90–120 dB (7 Levels)
Range Precision Better than 15 mm
Serial Communications** RS232 or RS485 (half-duplex)
Battery Life Li-ion (Listening) 3 Days
Operating Voltage 24 or 48 V dc (±10%)
External Power
Active (Listening)
Peak (During Transmission)
<3 W typical (max 10 W when charging)

<80 W

Serial Communication Connector Subconn (8-way female)
Remote Transducer Connector Burton (3-way male)
Housing Mechanical Construction Aluminium 6082, hard anodised Aluminium 7075, hard anodised Aluminium 7075, hard anodised
Remote Transducer Mechanical Construction Stainless steel 316
Maximum Dimensions; Length x Diameter 768 x 200 mm  768 x 200 mm  768 x 200 mm
Housing Diameter 134 mm 134 mm 140 mm
Weight in Air/Water***
Housing Assembly
Cable (5 m)
14.3/5.3 kg
3.2/2.7 kg
2.7/1.4 kg
14.7/5.7 kg
3.2/2.7 kg
2.7/1.4 kg
15.5/6.0 kg
3.3/2.8 kg
2.7/1.4 kg
Temperature (±0.1°C) Standard
Strain Gauge Pressure Sensor (±0.1%) Standard
Hige Precision Strain Gauge (±0.01%) Optional
Inclinometer (Tilt Sensor)
Range ±90°, Accuracy: ±1° (Vertical Orientation)