Umwelt- und Meeres-
technik Kiel GmbH
Wischhofstr. 1–3
Gebäude 15/16

24148 Kiel – Germany

Tel.: +49 431 72092-20

Fax: +49 431 72092-44

E-Mail: kum@kum-kiel.de


OBS Nammu - Ocean Bottom Seismometer

Nammu - The next development of Lobster

10 years after the development of LOBSTER we have the pleasure to introduce the spectacular next generation: NAMMU.

The power consumption was reduced by more than the half – simoultaneously the signal-noise ratio was increased to 142 dB

NAMMU is equipped with the broadband seismometer „trillium compact“ from Nanometrics, data are recorded with 32 bit from the datalogger „6D6“. Up to 8 instuments can be stacked on one pallet, up to 40 instruments find place in one standard 20“ container. As an alternative NAMMU can be equipped with 4.5 Hz geophones – power consumption decreases to 40% in case!

Technical data and functions Nammu

NAMMU, The Next Generation LOBSTER, is a Broadband OBS-System in a brand new design with many unique features:

In the robust and shock resistant syntactic foam shell are integrated a titanium pressure tube of 210mm diameter with broadband seismometer “Trillium Compact 120 sec”, data logger “6D6” and battery pack (see picture right), as well as titanium releaser KUMQuat, hydrophone and head buoy. Flasher, radio beacon and flag for localization are mounted outside.

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

Further Links:

Datalogger "6D6"
Releaser "KUMQuat"

Data Sheet:

June 2019

We are hiring!

Whether you are a software, mechanical or electrical engineer, come join our team and be part of future deep sea research and exploration.

Visit https://kum-kiel.de/jobs

October 2018

Follow SEA-SEIS project

In the project SEA-SEIS (Structure, Evolution And Seismicity of the Irish offshore), scientists from the Dublin Institute for Advanced Studies (DIAS) are deploying 18 of our OBS-Systems at the bottom of the North Atlantic Ocean.

Follow Daniel on a trip aboard the Celtic Explorer: [more]

March 2018

New OBS-Fleet delivered

A fleet of 18 OBS „NAMMU“ has been delivered to the Dublin Institute for Advanced Studies in Ireland (www.dias.ie). The tender has been awarded to K.U.M. last year due to the excellent quality and service we provide.