ROV Locator


Finally an underwater positioning system that doesn't cost more than the vehicle! The ROV Locator comprises a pinger mounted on the ROV and a USBL receiver module on the surface. Simply sync them up at the start of the dive and track the ROV location in real time on the QGroundControl map display. Serial communication and API available.

This system is designed for low-cost, medium accuracy localization of underwater objects.

  • The system can be used to guide an ROV to an area of interest, either manually or autonomously
  • The system can be used to locate an ROV
  • Other applications are also possible

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.


1x ROVL Transmitter
1x ROVL Receiver
1x ROVL manual
1x ROV Locator Windows app
Sample known points (for ROVL Windows app)
Drawings: Pipe flange adapter
Drawings: Sheet metal bracket


Download ROVL calibration files:  Coming Soon!
Maximum Depth 100m
Volume, Receiver Unit 295 ml
Mass, Receiver Unit 278 gm
Volume, Transmitter Unit 295 ml
Mass, Transmitter Unit TBD gm
Absolute Maximum Range 1 km
Typical Usable Range 300m
Apparent Yaw/Azimuth resolution*
Apparent Elevation angle resolution*
Slant range measurement resolution * 0.1 m
Slant range error accumulation (typical) 2 m/hr
IMU Euler angle accuracy, typical**
Update rate 1 Hz
Ping Frequency 25 kHz
Receiver V-in power 4.5V to 28V DC <1 Watt
Transmitter V-in power 4.5V to 28V DC <1 Watt

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

Download 1x ROVL manual
ROVL Locator Blog article:
ROVL Datasheet


The companion app to enable Cerulean Sonar devices to share their data with other hosts and services, such as QGroundControl or a BlueROV2: download here


ROV Locator