Integrated surface unit for acoustic positioning and communication


USBL Buoy
● The EvoLogics USBL Buoy is a fully integrated, plug-and-play surface gateway for real-time tracking of underwater assets: all in one single, compact system.
Simply unfold its antennas, set it into the water, and it’s ready to go - no pre-deployment calibration required.
Equipped with a USBL transceiver, AHRS, dual GNSS antennas, onboard PC, wireless access point and rechargeable battery, the buoy delivers accurate geo-referenced USBL positioning and seamless data exchange straight out of the box.
The design of its lightweight, robust carbon and glass fiber housing is inspired by fishing floats, ensuring stable operation in coastal and offshore environments. Designed for rapid deployment, it can be transported, assembled, and operated by a single person.
The buoy runs EvoLogics’ SiNAPS software onboard, and is a full-fledged EvoLogics modem inside - allowing live data exchange, custom scripting, and integration with your own software to adapt the unit to the specifics of your application.
USBL Buoy

The EvoLogics USBL Buoy combines key features that deliver precision, reliability, and seamless integration across the EvoLogics acoustic product range.
A compact, self-contained unit with USBL transceiver, dual GNSS, onboard PC, wireless access point and rechargeable battery, designed for reliable positioning and acoustic communication and pre-calibrated for fast and easy deployment.
The onboard SiNAPS software provides live tracking of mobile assets equipped with acoustic transponders - such as AUVs, ROVs, or divers.
The lightweight carbon and glass fiber housing, inspired by fishing floats, ensures stability and reliable operation across a wide range of environments.
The buoy is designed for one-person handling. With quick-release locks, it can be dismantled into three parts for easy transport, and rapidly reassembled without tools. Simply unfold the antennas, power up – and it is ready to go.
Integrated dual-antenna GNSS with optional RTK delivers precise positioning without the need for pre-deployment calibration.
Each USBL Buoy is tailored to its frequency band and integrates seamlessly with the corresponding EvoLogics acoustic product family, ensuring full interoperability between surface and subsea systems.
The USBL Buoy features a full-fledged EvoLogics modem, enabling simultaneous positioning and advanced data delivery. It supports multiple data handling methods, addressing, and networking, and includes a comprehensive command set to configure settings and control performance. The system allows live data exchange, supports custom scripting, and can be integrated with your own software to adapt the buoy to the specific requirements of your operations.
USBL Buoy
The EvoLogics USBL Buoy is available in multiple configurations, with flexible hardware and software options to support accurate positioning, acoustic data exchange, and seamless system integration.
[01]
Any device from the EvoLogics PRO USBL range can be selected for your Buoy configuration. Choose the frequency band and directivity pattern combination that best fits your application scenario.

[02]
Choose between NiMH or Li-ion batteries and several capacity options - up to 342 Wh available to support longer operation times.

[03]
Wifi: Connect directly to the buoy for short-range operation, typically up to 200 m.
Wifi with land station: Extend your reach with a tripod-mounted antenna, allowing connections up to 1500 m depending on configuration.
Long-range radio with land station: enables long-range communication over 5 km, and up to 15 km in optimal conditions, with optional LTE and tripod-mounted antennas for maximum coverage.

USBL Buoy
Operating range
1000 – 8 000 m (depending on base model)
Frequency
High-, mid-, and low-frequency options
Transducer Beam Pattern
Directional and omnidirectional base models
Base model
Any PRO USBL device
Slant range accuracy
0.01 m
Bearing resolution
0.1°
Nominal SNR
10 dB
Host interface
Ethernet
Integrated AHRS
Yes
GNSS
Dual antenna (GPS, GLONASS), optional RTK or Base-Rover configuration
Wireless communication
Wifi 2.4 GHz, dual antenna. Land station with tripod and long-range radio options available
On-board PC
Pre-installed SiNAPS Software
Stand-by Mode
2.5 mW
Listen Mode
5 – 285 mW
Receive Mode
0.8 W
Transmit Mode
up to 70 W (depending on base model)
Power Supply (Internal)
Rechargeable Li-Ion or NiMH battery, battery capacity up to 342 Wh
Dimensions (total / main body)
1138 × 280 × 2240 mm / Ø 180 mm
Dimensions (over- / underwater)
690 mm / 1550 mm
Weight in air
19 kg (base model in Delrin housing)
Build
Composite carbon and glass fiber body
Assembly
Dismantles into 3 parts with quick-release locks
*Reference dimensions and weight of the USBL Buoy 18/34 in Delrin housing. Dimensions and weights of other builds/base models vary
Contact
Get in touch and share your project requirements – let’s put together the optimal USBL Buoy for your operations.
All information you provide us is treated with strict confidence and stored only in relation to your request.
