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This product offering is for the Locator Beacon - 100m only. This Transmitter is part of a USBL system designed for low-cost, medium accuracy localization of underwater objects. It can be used to guide an ROV to an area of interest, either manually or autonomously. The system can also locate an ROV among other possible applications.

SKU: LOC-USBL-TX-100         HS Code: 9015.80


A complete system requires both a transmitter and a receiver. After calibration, transmitters are paired with specific receivers and should not be interchanged. The system works by syncing the clocks of a transmitter and receiver. The transmitter then sends a sound pulse once per second. The receiver uses time-of-flight to calculate slant range to the transmitter and phase measurements to determine the arrival angle of the sound pulse.

Technical Details

Technical Details Values

Maximum Depth


Volume, Transmitter Unit

295 ml

Mass, Transmitter Unit

327 gm

Absolute Maximum Range

1 km

Typical Usable Range


Apparent Yaw/Azimuth resolution*

Apparent Elevation angle resolution*

Slant range measurement resolution *

0.1 m

Slant range error accumulation (typical)


IMU Euler angle accuracy, typical**

Update rate

1 Hz

Receiver V-in power

4.5V to 28V DC <1 Watt

Resolution does not equal Accuracy - ** Magnetic errors not included



What comes in the box

  • One Locator Beacon – 100m
  • Note: You can find ROVL documents and applications HERE

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