NAMMU

This configuration allows the recording of one year. For 3-year recording, additional batteries are added with a power backpack for the OBS. Hence the OBS can also be deployed in extremely remote areas with access every couple of years only.

The utmost small size of half of a pallet simplifies the handling and enables stacking three of them in two rows on one pallet.
Anchor and float are asymmetrically designed: NAMMU descends to the seafloor and stays there for data recording in a horizontal position but ascends to the water surface in a vertical position.

Thanks to the new Data Logger “6D6, a couple of unique features are possible – in short:
modular system with multiple channels: starting with four seismic channels, one can freely add additional channels for different purposes

• GPS unit and also AIS can be incorporated
• CSAC (Chip Scale Atomic Clock) is available
• It is possible to swap the storage device from outside the housing while recording

Technical Data

• Size: half a pallet: 800mm x 600mm x 600mm
• Weight: 155kg without anchor, 205kg with anchor, stackable
• Operation depth: 6000m
• Frame: titanium, flexible buoyancy from syntactic foam
• Power supply: 13,7 month recording: 80 Lithium cells
• 36,0 month recording: 270 Lithium cells
• Data Logger: Seismic Data Logger „6D6“
• Releaser: K/MT 562 KUMQuat, titanium
• Hydrophone: HTI-04-PCA/ULF
• Seismometer: Broadband Seismometer
• Positioning: Nanometrics „Trillium Compact 120“, or Geophone
• radio beacon, flasher, signal flag AIS as an option
• Anchor: steel anchor