In EGS, we use cutting edge technology for capturing geophysical and bathymetric spatial data in deep water utilising Remotly Operated Vehicles (ROV).
EGS also provides survey solutions for different survey purposes on the subsea platforms such as ROVs and AUVs as a work horse.
When a deep water Multibeam Survey is conducted, the ROV is equiped with bathypack or digiquartz to aid the depth measurement accuracy. The precise subsea depth measurement is adjusted with a surface barometer reading. The final depth product is injected to INS to aid the vertical accurcy of the INS too.
The combination of the inertial positioning principle with the acoustic positioning system can provide a higher accuracy and more robust solution of the acoustic position. In EGS we supply coupled INS and DVL, precisly completed to comply with the specifications of the hi-res surveys. The INS/DVL solution aids the USBL subsea positioning to a remarkable level of accuracy that is industry proven.
EGS has aceess to ROV mountable cmbined side scan sonar and sub bottom profilers within the EGS group, such as EdgeTech 2000 series. SSS and SBP data are aquired and process with SonarWiz or EGS' in-house developed processing software "C-View".Any objects of interest captured by SSS could be investigated further using HD cameras installed on the ROV.
To fulfil the requirement of visual inspection in shallow water in operations such as Anchor Clearance Survey, Pre-Lay survey, Shallow water touch-down monitoring (TDM) and trench/pipe-line inspections EGS utilise smaller camera and ROV solutions. EGS often uses Eyball ROVs such as Deep Trekker DTG3, a micro ROV for target observation in 40m water depth max, and Cameras like Spot X Pro Squid 2 for target observation in 40-100m water depth
Deep Trekker DTG3 with 200m depth rating, 50m tether system, 8 hours endurance, 4K Ultra HD low-light camera to be used in water depth less than 40m.
In deeper waters or environments with high current this ROV could be deployed with a clump weight and a messenger line to the location of interest.
Purpose-built system for viewing real-time underwater footage can be used as a drop camera/ towed camera. With built-in on-screen depth sensor and zero latency live video, Dual dimmable 1500 lumen LED lights and 150m of cable suitable to be used for depth between 40m to 100m.
VisualSoft Suit is used for the digital video capture, eventing and processing. The VisualSoft Suite is a modular range of software applications designed specifically for use during subsea structure and pipeline inspections.
As well as software for acquisition and archiving, VisualSoft provide a powerful software platform for offline processing of video and survey data. VisualEdit Professional is an automated data processing and data editing package which provides a fast and consistent method of processing survey data. VisualEdit Professional reduces the man-power required to process survey data and delivers a quality result that is repeatable and easily checked.
In addition to all three encoded ROV video cameras VisualSoft is able to capture and process the MBES or profiling scanner data to generate the cross and longitudinal profiles.
VisualEdit Professional offers a complete solution for automated processing of survey data.
The offline data processing features enable true auto-processing of cross profile (including Multibeam data) and survey track data using rigorous algorithms which reliably reject noise and smooth data.
EGS use thetwin Ag/AgCl contact probe system, deployed by ROV to inspect the condition of offshore pipeline cathodic protection systems. Two high purity Ag/AgCl half cells are housed within a contact probe body, allowing contact and continuous potential & field gradient measurements to be taken.
The TSS HydroPACT 660 and TSS 440 coil system continues the legacy by bringing pipe and cable tracking and UXO detection capabilities to a range of ROVs from small inspection and observation class ROVs to work class and trencher ROVs. The TSS660 and 440 system is one of the best industry proven system which provides the position of conductive assets on or beneath the seabed.
