Mariner Deep

Mariner Deep has a published maximum operating depth of 3,048 meters (10,000 feet), with a housing pressure rating of 30.4 MPa (304 bar). The system is engineered for deepwater seabed seismic acquisition where equipment must operate under substantial hydrostatic pressure. Its pressure-rated construction supports autonomous recording throughout the deployment period, within the specified operating limits.

Mariner Deep supports up to 200 days of continuous autonomous seismic recording. Its long-duration battery module enables extended seabed deployments without requiring an external power connection. The system also provides 32 GB of solid-state flash memory per recording channel. These capabilities give acquisition contractors greater flexibility when planning survey schedules and long-duration offshore operations.

Deepwater node deployment and recovery can involve significant vessel resources, specialized equipment, and complex logistics. Extended recording capability gives contractors more flexibility to accommodate acquisition schedules without retrieving nodes solely to replenish battery power. With up to 200 days of continuous operation, Mariner Deep is designed to support long-duration projects while helping reduce operational interruptions associated with equipment servicing.

Mariner Deep uses three orthogonally oriented Geospace GS-ONE OMNI 10 Hz geophones and one hydrophone for four-component seismic recording. The geophones measure particle motion along three axes, while the hydrophone records pressure variations. Together, these sensors provide multicomponent seismic data for subsurface imaging and analysis. The system’s 10 Hz geophones are designed to operate across varying orientations, supporting recording performance in seabed deployments.

Mariner Deep combines 24-bit digitization, selectable sample intervals, high-sensitivity seismic sensors, and onboard solid-state recording. Its specified instantaneous dynamic range is 129 dB at a 2 ms sample interval, with equivalent input noise of 0.12 µVrms under the same sampling condition. The system includes a built-in full-resolution test generator to support equipment verification. These capabilities help maintain consistent recording performance throughout extended acquisition operations.

Mariner Deep includes an internal three-component magnetic heading sensor with specified accuracy of ±5°. Heading measurements are written to the recording header every 2,000 samples, providing orientation information for subsequent seismic data processing. Accurate heading information is important when interpreting three-component particle-motion measurements and aligning the recorded data with the survey coordinate system.

Deepwater survey economics are influenced by vessel time, deployment and recovery operations, equipment utilization, and the cost of maintaining recording systems offshore. Mariner Deep’s extended battery life and autonomous operation allow contractors to plan longer deployments without interruptions solely for battery replacement. Its four-component recording system and onboard data storage support acquisition throughout these extended periods. By reducing certain servicing requirements and increasing operational flexibility, Mariner Deep can contribute to more efficient use of offshore resources.