The broadband Ocean-Bottom Seismometers (OBS) are provided for the project by iMARL, the Insitu Marine Laboratory for Geosystems Research, hosted by DIAS. The OBSs are of the new model NAMMU, manufactured by K.U.M. (Germany).
Currently, this is the smallest broadband seismometer for long-term deployments. The instrument has four channels (three components of the ground displacement and one broadband hydrophone) with 32 bit recording at 250 samples per second. It has 300 mW total power consumption, including by its 120 s broadband Trillium Compact seismometer, manufactured by Nanometrics (Canada).