Marine Technical Center
The Marine Technical Center (MTC) company effects the sale and delivery of the Russian state-of-the-art CRAB Ocean Bottom Seismic System. MTC performs furnishing, packaging, delivery and installation as well as warranty maintenance and after sales support of the System.
Mobile seismic system for marine surveys and monitoring on the shelf and in transition zones.
The system based on 4C Ocean Bottom Nodes which are controlled by the system’s lab containers.
Designed for offshore seismic exploration and regional studies.
Ocean Bottom Nodes
Operation in any orientation at the seabed
Autonomous operation during 45 days
Battery recharging time is 24 hours
Diameter 245 mm
Height 132 mm
Weight in air 12 kg
- Charging batteries of the Ocean Bottom Nodes
- Controlling the Ocean Bottom Nodes
- Downloading recorded data from the Ocean Bottom Nodes
- Up to 400 Ocean Bottom Nodes
- Can be powered by different supply source (220V, 380V, 440V)
CRAB System Features
Can be operated onshore
or at depth up to 500 meters
is 24 hours max.
from -10° to +50° C
CRAB System Applicability
The object of regional studies is a large geological structures (both lateral and deep scale). The purpose of these works is to study the structure of the sedimentary cover and consolidated crust.
Hydrocarbon exploration is aimed at a geological structures of sedimentary cover detailed study. The purpose of these works is detailed study of the explored area with the allocation of small-scale structural elements and hydrocarbon deposits.
Ocean Bottom Nodes
Electric technical specifications
Orthogonal oriented Geophones: BH-20MT OMNI / GS-ONE OMNI
24 bit, delta-sigma with sample interval 0.25, 0.5, 1, 2, 4 ms
0, 6, 12, 18, 24, 30, 36 dB
Max input signal
1.8 V (rms)
Equivalent input noise
0.08 – 3 μV (rms)
Instant dynamic range
126 dB at 0 dB gain
Geophone electric technical specifications
Distortion (in any orientation)
Open loop sensitivity
Sensitivity at 70% Damping
Hydrophone electric technical specifications
(at temperature 25°C, pressure 1 atm)
CRAB System Manufacturing
Marine Technical Center Limited Liability Company
Dvinskaja st., 14A, space 1-n, office 70,
St. Petersburg, Russia, 198035