The Sonardyne Autonomous Monitoring Transponder or AMT and Fetch share similar functions but what’s the difference and what’s the advantage of Fetch over an AMT?

The AMT is very much Fetch’s ‘little sister’.

Both instruments are long endurance subsea logging nodes with an inbuilt acoustic modem to enable data to be accessed remotely and therefore the ideal partner for remote and precise seabed monitoring.

The difference is that Fetch has been designed for very long-term monitoring with a battery life of up to 10 years and more, compared to around five years maximum for the AMT.

Fetch is also more adaptable to your needs with more options to customise your instrument. One such option is the AZA (Ambient-Zero-Ambient) mechanism which eliminates pressure sensor drift via in-situ calibration of the pressure sensor.

Eliminating the pressure sensor drift enables you to detect minute-level vertical changes over long periods of time, revolutionising the capability to monitor seabed subsidence and tectonic activity.

For more information about the Fetch instruments and their capabilities, watch the video below.