Modem 6 acoustic modems are a cost-effective solution for simple point-to-point data transfer from a wide range of sensors including, data loggers, ADCPs, CTDs and other subsea instruments. It’s therefore ideal for applications such as: near real time data streaming, data harvesting or subsea command and control. Built around our field-proven 6G hardware and Wideband 2 acoustic signal platforms, operating at speeds between 200 and 9,000 bps, you can be assured of reliable communications performance, whatever your application, water depth or duration of deployment.


Modem 6 acoustic modems are aimed at simple applications, which do not require the more complex functions of our core 6G range, such as precise positioning, on-board sensors or complex multi-node array telemetry. If you need any of these capabilities and/or an OEM solution, please get in touch so that we can identify the right solution for your project.


We offer a variety of surface deployed acoustic Modem 6 to suit any operational deployment scenario and data transfer mission.  You can mount them on a variety of surface platforms ranging from buoys to all sizes of vessels – both manned and unmanned – to interact with any of our underwater Modem 6 instruments.

OUR ACOUSTIC MODEM OPTIONS -point-to-point data transfer

Our family of surface deployed Modem 6 instruments benefit from same mechanics and electronics you’ll find in our other 6G dunker systems. These are trusted by leading offshore operators to perform in the most demanding marine environments and operational scenarios. With 6G at their heart, they are also compatible with our other 6G instruments, including our RT6 range of acoustic releases.

Modem 6 Transceiver
Offers ultimate performance with excellent vessel noise rejection. Multiple receive elements ensure the highest data rates possible . Can be upgraded to Ranger 2 USBL transceiver.

• MF and LMF options available
• Optimised for noisy environments
• Ideal for permanent vessel fit
• Surface system kit: SIU, cable drum, cage

Modem 6 Dunker
Available in MF and LMF, omni and directional, the Modem 6 Dunker is a rugged easy-to-mount instrument designed for excellent horizontal and shallow water communication

• Up to 9000 bps true user data rate
• Shock mounted electronics
• MF/LMF omni or directional transducers
• Rugged, easy to mount housing

Modem 6 Mini-Dunker
Bump guards offer protection from knocks during deployment and recovery

• Perfect for small vessels
• RS485 comms interface
• Surface system kit: Mini-Dunker, SIU and cable