Subsonus Tag

Subsonus Tag is a low cost acoustic positioning transponder that operates with the Subsonus USBL. It features an integrated battery, wireless charging and a pressure tolerant display. Ultra low-power consumption allows operation for up to 18 months on one charge. Up to 65,000 Tag underwater transponders can be tracked by one surface Subsonus unit.

USD 2,430
Standalone unit with charger. Volume discounts available.

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Ultra Long Battery Life
Ultra Long Battery Life
Subsonus Tag features a revolutionary acoustic processing architecture that allows it to achieve unparalleled battery life of up to 18 months in slow update applications. Transmit power is configurable which allows extra battery life to be achieved when operating at close range.
Multi-track Technology
Multi-track Technology
Up to 65,000 Subsonus Tags can be deployed in the same area and tracked using one surface Subsonus unit. Each tag has a unique address and can be assigned a name for easy identification.
Integrated Display
Integrated Display
Subsonus Tag features a pressure tolerant display that allows for fast and easy identification of multiple tags and their status. The electronic paper technology consumes no power between updates of the screen graphics.
Hermetically Sealed
Hermetically Sealed
The revolutionary design of Subsonus Tag features total encapsulation of the electronics and batteries. This unbroken hermetic seal offers unparalleled reliability since there are no pressure vessels, air cavities, o-rings or connectors. The only servicing required is biofouling management.
Wireless Charging
Wireless Charging
Subsonus Tag contains a Qi compatible wireless power receiver for convenient battery charging without using connectors. Qi charging is the standard found in most phones, so chargers are readily available at low cost.
Bluetooth Communication
Bluetooth Communication
Tags can be quickly configured and updated from a smartphone using bluetooth. An RS232 or USB bluetooth interface is also supported for configuration with a PC application.
Breakthrough Price
Breakthrough Price
Subsonus Tag redefines the low cost underwater transponder market with massive savings from the hermetically sealed, connectorless design. This allows deployments in applications previously not feasible due to cost.
1000 Metre Range
1000 Metre Range
Subsonus Tag has an acoustic tracking range of up to 1000 metres and is depth rated to 2000 metres.


Subsea Asset Tracking
Subsea Asset Tracking
Subsonus Tag is ideal for subsea asset tracking applications with an ultra long battery life of up to 18 months and support for up to 65,000 tags operating in the same area. It features a rich, easy to use 3D web interface to fully visualise the environment and super simple deployment with minimal configuration and no cables.
Remote Sensing
Remote Sensing
Subsonus Tag is an industry changer for remote sensing applications. Multiple tags can be positioned along infrastructure to accurately measure position, orientation and flex. Subsonus Tag features integrated roll, pitch, heading and temperature sensors that report back to the master unit acoustically. With a battery life of up to 18 months, costly maintenance can be drastically reduced.
Vehicle Tracking
Vehicle Tracking
Subsonus Tag is well suited for low cost vehicle tracking applications. The compact size allows quick, simple mounting on even the smallest of vehicles and the in-built battery permits the Tag to continue tracking when the vehicle power is lost.
Diver Tracking
Diver Tracking
Subsonus Tag is ideal for diver tracking applications, increasing safety and awareness. Many divers can be tracked and monitored from a surface vessel simultaneously.


Positioning (With Subsonus USBL)
Position Accuracy
(5 m range)
0.25 m
Position Accuracy
(100 m range)
1.5 m
Position Accuracy
(1000 m range)
15.0 m
Frequency 30 kHz (broadband)
Range 1000 m
Beam pattern Omnidirectional
Range timing accuracy 0.01 m
Maximum Update Rate 1.3 Hz
Transmit Power Dynamic
Data Transfer Yes
Remote Acoustic Configuration Yes
Roll & Pitch Accuracy 1.0 °
Heading Accuracy 2.0 °
Heading Source Magnetic
Water Temperature Accuracy 0.5 °C
Display Type Pressure Tolerant Electronic Paper Display (EPD)
Display Size 54 mm
Display Resolution 122 x 250 Pixels
Display Daylight Visibility Direct Sunlight
Display Backlight Yes (Configurable)
Battery Capacity 28 Wh
Battery Life
(5 second ping rate)
48 hours
Battery Life
(1 ping/hour)
30 days
Battery Life
18 months
Charging Qi Wireless Charging v1.2
Battery Recharge Time 6 hours
Interface Bluetooth Low Energy v4.1
Material Polymer Composite
Depth Rating 2000 m
Operating Temperature -5 °C to 50 °C
Storage Temperature -20 °C to 60 °C
Shock Limit 40 g
Dimensions 52x52x125 mm
Weight in Air 550 g
Weight in Water 250 g


Download / Link
Subsonus Tag Datasheet
Subsonus Tag Reference Manual
Subsonus Tag 3D Model


Subsonus Tag Firmware v1.3
The latest firmware for all hardware versions of Subsonus Tag. This can be loaded onto Subsonus Tag using the Subsonus Tag Manager Android app. The changelog can be found in the reference manual.
Release date
17 December, 2019
Subsonus Tag Manager
Subsonus Tag Manager is an Android app for configuring, checking the status and updating the firmware of Subsonus Tag.
Release date
16 January, 2019