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MicronNav USBL Positioning

The MicronNav Ultra Short Baseline Locating system allows you to gain awareness of the relative position of your ROV, as well as to keep a recorded track of where your ROV has been. Understanding your ROV's location and where it has already searched or investigated can be challenging. Without the ability to utilize GPS underwater, ROVs rely on the use of sound technology for navigation and locating. The USBL system allows for more efficient and effective missions for defense applications, archeology, energy, search and rescue, and more.

MicronNav USBL Positioning

The MicronNav Ultra Short Baseline Locating system allows you to gain awareness of the relative position of your ROV, as well as to keep a recorded track of where your ROV has been. Understanding your ROV's location and where it has already searched or investigated can be challenging. Without the ability to utilize GPS underwater, ROVs rely on the use of sound technology for navigation and locating. The USBL system allows for more efficient and effective missions for defense applications, archeology, energy, search and rescue, and more.

  • Absolute GPS Positioning icon

    Underwater GPS Positioning

  • Pivoting tether connection-icon

    500 m horizontal range

  • Advanced sonar integration icon

    150 m vertical range

  • Built to last icon

    20 cm accuracy

Ultra Short Base Line (USBL) Positioning System for tracking ROVs

In open water applications where you want to know exactly where you are and where you are going, use this positioning system to track your ROV.

Using a dunking transducer at the surface and a transponder mounted to the top of the ROV, the two communicate using acoustics. The relative position of the ROV to the dunking transducer is calculated and then through Bridge software is displayed on a Google Map on your controller.

Allowing you to visualize your ROV position during the dive and plot points of interest.

Track and Log Data

Ocean Science ROV operators historically use USBL to track where they saw certain features and log data over the span of their dive.

Inspection companies inspecting critical infrastructure use the USBL to log where they find defects and anomalies during an inspection.

MicroNav Sonar Specs

Positioning technologyUltra Short Baseline (USBL)
Frequency band20 – 28kHz
Tracking range500 m horizontal, 150 m vertical
Range accuracy±0.2m
Bearing accuracy±3° (determined by USBL integrated heading sensor)
Position update rate0.5 – 10s
Targets tracked1 responder, 15 transponders
Data displayPolar and Cartesian display with optional bitmap chart, marker overlay and tracking features
Data recordingData recorded in Seanet Pro format
Surface navigationMost GPS, Heading or Altitude sensors supported by Seanet Pro

MicronNav100 Surface Hub

AC power supply90V to 264V, 47Hz to 63Hz
DC power supply12V to 36V, 2.1mm pin (positive core)
Power consumption4.8W from either source with no additional load
DC power output50W or 2A maximum current draw, +33V with AC input, 1.5V less than supply on DC input, defaults to highest voltage if both AC and DC are connected
Additional portsUSB 2.0, RS232, RS422, RS485, ARCNET LAN
Dimensions232 x 185 x 52mm (width, depth, height)
Weight1.3kg
MaterialsPainted aluminium with matte anthracite textured finish
IP ratingIP21 (no protection against water ingress)
Temperature rating5 to 35°C operating, -20 to 50°C storage

Micron Modem

BeamwidthOmni-directional
Power consumption12 – 48V DC (3.5W transmitting, 0.28W standby)
Transmitter source level169dB re 1μPa at 1m
Communication protocolsRS232 or RS485 (in Responder mode)
Depth rating750 m
Diameter56 mm
Height76 mm
Weight in air225 g
Weight in water70g

USBL Transducer

Operating beamwidth180°
Maximum diameter110 mm
Body tube diameter75 mm
Height270 mm
Weight in air2 kg
Weight in water0.8 kg
Depth rating30 m
Deck cable length10m standard 20, 30, 50m available