Underwater Acoustic Modem

Transmitting data reliably though water that may be turbid or saturated with unwanted noise is extremely difficult. Acoustics have been proven to be the most reliable method to transmit critical data in this harshest of environments.

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Small size

Small size makes it easy to integrate on any ROV/AUV.

Easy to use

Serial interface and omni-directional acoustics for easy and reliable communication.

Proprietary protocol

Reduce packet loss and stop worrying about poor data quality.

How the Water Linked modems work:

Operating principle

Transferring data underwater has traditionally required cabled solutions. An underwater wireless modem can allow for two-way-communication without the need for cables. Employing a wireless solution can greatly simplify what were previously considered to be resource heavy tasks.


The Water Linked Modem is fully omnidirectional! Omnidirectional means that the modems can be turned around all axes and still maintain its robust data link. This is especially important for ROV/AUV applications where the modems are in constant motion.

Multiple acoustic connections

The modem has the ability to communicate on multiple channels, with every modem capable of being adjusted to any one of these channels though a serial command.

This allows one modem to communicate with multiple modems on the same or different channels.

No clash of data

Propriety signal processing allows the multiple modems to operate at the same time without fear of inference.


Low power electronics ensure the modems do not drain excessive power from your system, while ensuring you achieve reliable long range communication.

Water Linked Acoustic Modem vs legacy products

When the first subsea acoustic modems came to the market (and actually still), the manufacturers designed their modems as simple “pingers” where the digital information was encoded as frequency A for “1” and frequency B for “0”. The receiving modem would pick up these frequencies and feed 0’s and 1’s to the receiving computer. This method is extremely vulnerable to packet loss and other interference and the result was that very often the information received was corrupt.

The Water Linked Modem takes a completely different approach. It uses an advanced proprietary protocol where a significant portion of the gross available data rate in the wireless link is used to enclose the information with error correction features. Customers can therefore put confidence in the data link. In many applications, it is a valuable feature that you can actually trust that the information received is correct.

Available products

Modem M16

Explore our two-way, 16 bits per packet modem, the M16

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