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 für amphibische Seismologie): German Instrument Pool for Amphibian Seismology, Journal of largescale research facilities, 3, A122, doi: 10.17815/jlsrf-3-165

The OBS on deck is ready for operation.
The OBS on deck is ready for operation. (Photo: Alfred Wegener Institut)
Deployment of the DEPAS OBS.
Deployment of the DEPAS OBS. (Photo: Alfred Wegener Institut)
DEPAS OBS after emerging at the sea surface.
DEPAS OBS after emerging at the sea surface. (Photo: Alfred Wegener Institut)
Number of instruments 70
Seismometer, gimbal-mounted Güralp CMG-40T OBS, 60 sec - 50 Hz
Trillum Compact OBS, 120 sec - 100 Hz
Hydrophone HighTechInc HTI-04-PCA/ULF, 100 sec - 8 kHz
Digital data recording unit Send Geolon MCS, 24 bit, 1 - 1000 Hz, 20/32 GB
Kum 6D6, 32 Bit, 50 - 4000 Hz, 128 GB
Acoustic release transponder Kum K/MT 562 with Kum K/MT 8011M onboard unit
VHF radio beacon Novatec RF-700A1
Novatec MMB-7500
Xeos XMB-7500
VHF bearing receiver Seimac DR500
Xeos R1000
Flashlight Novatec ST-400A
Novatec MMF-7500
Xeos XMF-7500
Floating unit Syntactic foam
Frame and pressure tubes Titanium alloy
Anchor Iron
Maximum deployment depth 4000 m / 6000 m
Maximum deployment duration 14 months
Dimensions (excl. flag and beacons) Small: 1.65 m x 1.30 m x 0.72 m
Large: 1.45 m x 1.07 m x 0.72 m
Weight (exkl. anchor / incl. anchor) Small: ca. 340 kg / 405 kg
Large: ca. 320 kg / 385 kg
Transport 12 units per 12' sea container