The key components of the NAMMU OBS are:
Up to 50 units can be transported in one 20-foot shipping container. Easy and intuitive programming is offered over a web interface via Wi-Fi – accessible from your laptop or smartphone. No special software is required. Usually a free-falling system, it can also be deployed by ROV.
Deployments of up to three years are possible due to low power consumption with reliable storage of vital instrument data and metadata. Good coupling is facilitated through a compact instrument design and an aquadynamic shape enables industry-leading low levels of external noise.
Extremely reliable acoustic release is key for retrieval. Other features include quick location of the instrument with radio beacon and flasher, as well as fast data download via external memory StiK. Easy, fast data conversion to mSEED is possible via our portable open-source software.
|Weight with 80 Li-Cells||In air (In salt water)|
|Weight without anchor Weight with anchor||156 kg (-13 kg) 205 kg (30 kg)|
|Weight of pressure tube Weight of Releaser KUMQuat||45 kg (33,6 kg) 11 kg (6,4 kg)|
|Maximum operation depth||6000 m|
|Maximum operation time||13,7 months (80 LiThCl D-cells) 36 months with optional battery backpack unit|
|Size without flag w × h × d||635 mm × 770 mm × 800 mm|
|Anchor size||800 mm × 600 mm|
|Seismic Sensors||120 sec broadband seismometer or 4.5 Hz Geophones|
|Pressure Sensor||100 sec Hydrophon HTI-04-PCA ULF or Differential Pressure Gauge (DPG) or Absolute Pressure Gauge (APG)|
|Data Logger||KUMO 6D6: 4 channels at 32bit at 142db|