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.

FLOUNDER Composition

Ocean Bottom Nodes


Operation in any orientation at the seabed

Built-in nodes self-diagnostic system, including testing of registration channels

Autonomous operation during 50 days

Collapsible design, based on sensor unit and battery unit

Battery recharging time is 12 hours

Preparing the node for repeated work - no more than 10 minutes (changing the battery unit)

Physical characteristics:

Dimensions 505 х 300 х 145 mm

Weight in air 26 kg

Technical Specifications:

4 channels
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 (2ms, 0dB)
< 3 mV
Dynamic Range
125 dB
> 90 dB
Amplitude non-identity
< 0,5%
> 100 dB (geophone channels) / > 90 dB (hydrophone channel)

Lab container


Charging batteries of the Ocean Bottom Nodes

Controlling the Ocean Bottom Nodes

Downloading recorded data from the Ocean Bottom Nodes


Up to 288 Ocean Bottom Nodes

Can be powered by different supply source (220V, 380V, 440V)

CORAL System Features

Can be operated onshore
or at depth up to 500 meters

Repreparation time
is 24 hours max.

Operating temperature
from -10° to +50° C


Marine Technical Center Limited Liability Company

+7 812 339-94-84


Dvinskaja st., 14A, space 1-n, office 70,
St. Petersburg, Russia, 198035

We will contact you within 1 working day!