Panego Subsea - Sounding out risk

General FAQ

Conventional sidescan sonar and multi-beam (Tritech, Kongsberg, Reson, etc) can give positional information but on surface features only. It can only image exposed cables and other seabed features and not buried geohazards. The sub-bottom profiler (Edgetech, Kongsberg, Ixsea, Innomar, etc) can see sub-seabed but only a single 2D line with limited resolution and would require multiple lines and crosslines to cover the proposed route.

Magnetometer (Innovatum, TSS, “Pipetracker”, etc) works on the basis that field measurement infers position but requires target details. Magnetometer will identify magnetic anomalies along the route corridor but sizing of objects is difficult to determine, also non magnetic geohazards would not be identified. Pipetrackers are not used for pre-route survey.

Our Sub Bottom Imager gives a full 3D image of sub-seabed down to around 6m depth and 5-8m swathe and can see both man-made and natural non-metallic targets. It can also identify the accurate depth of live cables – the only technology that can currently do this. The SBI can be used for the initial pre-lay survey on a chosen cable route, identify anomalies which could cause lay problems, identify possible alternative and carry out a post-lay survery to verify accuracy.

The SBI and Acoustic Corer are depth rated to 1000m at present but can be upgraded to achieve deeper depths.
Primarily speed of acquisition compared to ROV typically 0.5-1Knt but AUV > 4Knts. AUV can be deployed from a less expensive vessel.
Typical WROV speeds of 1-2 kts are recommended

PanGeo technology interrogates the seabed using beam forming techniques often used in Non-destructive Testing (NDT) and medical ultrasound approaches.  Our technology challenges conventional geophysics by combining multichannel ultrashort baseline arrays and synthetic aperture sonar to produce 3D images of the seabed.

PanGeo rendered data can be loaded, viewed and manipulated in the industry standard EIVA Navi-Suite of survey software tools. Rendering is accomplished using PanGeo proprietary software.

All PanGeo's tools record and save raw time series data. The rendering step of the processing uses seabed velocity to achieve 3D focusing. Any man-made objects (i.e. buried cables or pipelines) in the seabed can be readily used to achieve "good of focus" by re-rendering from the raw recorded data as necessary to maximize image quality. Where geology is the target, and no man-made objects are available, the variable data path lengths can be used in a "gather" approach to optimize velocity estimates.