operation. (Photo: Alfred Wegener Institut) Deployment of the DEPAS OBS. (Photo: Alfred Wegener Institut) DEPAS OBS after emerging at the sea surface. (Photo: Alfred Wegener Institut) Number of instruments [...] Technology A description of the DEPAS instruments can be found in this publication: Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung et al., 2017: DEPAS (Deutscher Geräte-Pool