K.U.M. Umwelt- und Meerestechnik Kiel GmbH NAMMU

This configuration allows 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 to stack 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 horizontal position but ascends to the water surface in 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 4 seismic channels one can freely add additional channels for different purposes
· a GPS-unit and also AIS can be incorporated
· a 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