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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 Tags can be tracked by one surface Subsonus unit.

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.


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 indentification.


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.


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.


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.


Tags can be quickly configured and updated from a smartphone using bluetooth. An RS232 or USB bluetooth interface is also supported for configuration with the PC application.


Subsonus Tag redefines the low cost transponder market with massive savings from the hermetically sealed, connectorless design. This allows deployments in applications previously not feasible due to cost.


Subsonus Tag has an acoustic tracking range of up to 1000 metres and is depth rated to 2000 metres.

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

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

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

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
Frequency30 kHz (broadband)
Range1000 m
Beam patternOmnidirectional
Range timing accuracy0.01 m
Maximum Update Rate1.3 Hz
Transmit PowerDynamic
Data TransferYes
Remote Acoustic ConfigurationYes
Roll & Pitch Accuracy1.0 °
Heading Accuracy2.0 °
Heading SourceMagnetic
Water Temperature Accuracy0.5 °C
Display TypePressure Tolerant Electronic Paper Display (EPD)
Display Size54 mm
Display Resolution122 x 250 Pixels
Display Daylight VisibilityDirect Sunlight
Display BacklightYes (Configurable)
Battery Capacity28 Wh
Battery Life
(5 second ping rate)
48 hours
Battery Life
(1 ping/hour)
30 days
Battery Life
18 months
ChargingQi Wireless Charging v1.2
Battery Recharge Time6 hours
InterfaceBluetooth Low Energy v4.1
MaterialPolymer Composite
Depth Rating2000 m
Operating Temperature-5 °C to 50 °C
Storage Temperature-20 °C to 60 °C
Shock Limit40 g
Dimensions52x52x125 mm
Weight in Air550 g
Weight in Water250 g
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