Positioning & Offshore Construction
Survey Support


EGS offers marine construction contractors various
different options for construction barge positioning
including stand-alone vessel positioning and remote
anchor management systems.

EGS Positioning and offshore Construction Survey Support Services

Dimensional Control Surveys
Surface Positioning and Anchor Handelling
ROV Positioning and Inspection Support
Subsea Installation Survey Support
LBL Metrology
Pipe/Cable Laying Surevy Support
Jacket and Top-side Installation Support

Positioning and Offshore Construction Survey Support Services

EGS offers a full range of construction survey, project management and inspection capabilities including:

  • Dimensional Control Surveys
  • Surface Positioning and Anchor Handelling
  • ROV Positioning and Inspection Support
  • Subsea Installation Survey Support
  • LBL Metrology
  • Pipe/Cable Laying Surevy Support
  • Jacket and Top-side Installation Support

Dimensional control of subsea structures and onshore construction components

EGS offers both terrestrial and subsea laser scanning. Dimensional Control and monitoring services, utilizing proven engineering survey techniques and modern survey equipment , can provide substantial benefits to any project both onshore and offshore.

Dimensional control applications:

  • FPSOs, TLPs, SPARs, Semi-subs, Jackets, MinDocs, Compliant Towers, Onshore
  • Pre-fabrication of Hook-up Spools
  • Like-Kind replacement of Equipment and Piping w/complete 2D/3D detail drawings
  • Fabrication verification surveys for steelwork and pipe
  • Clash/Interference surveys for the replacement or installation of mechanical components
  • Deformation Analysis
Key project benefits from implementing Dimensional Control Survey management include:
  • Reduced design, re-work and shutdown times
  • Reduction of man-hours in potentially hazardous areas and activities
  • Guaranteed fit of pre-fabricated items
  • Elimination of multi-handling of components
  • Availability of archived data
  • Elimination of re-design during installation
  • Minimize fit-up issues that result in schedule/budget overruns

Surface Positioning & Anchor Handeling

EGS offers marine construction contractors various different options for construction barge positioning including stand-alone vessel positioning and remote anchor management systems. Using high accuracy Differential GPS positioning and heading systems installed on both the barge and anchor handling vessels, EGS provides a safe, reliable and cost effective solution. With the addition of a broadband connection on the barge, a remote link can be setup allowing remote monitoring and QC from the shore base office.

ROV Positioning and Inspection Support

EGS has extensive experience providing ROV support services, for various oilfield tasks including Inspection, Touchdown Monitoring, Repair and Maintenance (IRM) activities.
Using surface and subsea positioning equipment such as DGPS and USBL, EGS can provide a reliable solution for vehicle tracking and positioning. In addition to positioning, EGS offers inspection data acquisition and management .

Subsea Installation Survey Support

In addition to high accuracy surface vessel positioning, EGS owns a range of acoustic tracking and measurement equipment, that can be seamlessly integrated into the barge or installation vessel’s survey systems.
Combined together, Ultra Short Baseline (USBL) and Long Baseline (LBL) equipment provide a high accuracy solution for subsea positioning including ROV operations, diver-less metrology and spool piece design. For high accuracy positioning of ROV in deepwater environments, Inertial Navigation Systems (INS) can be integrated with LBL and other sensors to provide a solution to ensure the client’s specifications are achieved.

LBL Subsea Metrology

Long baseline (LBL) positioning has many applications both commercially and in research, from surveying a ship hull to positioning offshore platforms in deeper waters. The technique consistently provides accuracies in the order of decimetres over large areas, independent of depth. Recent advances include the integration with other acoustic techniques or with inertial navigation systems for greater levels of accuracy.

EGS provides the following LBL metrology services:

  • Array planning
  • Frequency planning
  • LBL calibration
  • High accuracy subsea installation and ROV tracking
  • Spool tie-in
  • Inertially aided acoustic subsea positioning
  • Provision of ISO drawings

In the ever demanding Oil & Gas sector, EGS offers bespoke reporting services, including near real-time offshore delivery by integrating data processing with charting facilities onboard.

Pipe/Cable Laying Surevy Support

EGS construction survey support services include:

  • Pipelay and Cablelay positioning and touchdown monitoring
  • Construction barge and support vessel positioning
  • Anchor handling support
  • Structure installation guidance
  • Acoustic underwater positioning
  • ROV survey sensors and system integrations
  • ROV inertial navigation
  • Jumper and Spool piece metrology
  • Dedicated ROV support vessels
  • Project management

Jacket and Top-side Installation Support

Developed through the successful execution of projects for Oil & Gas, Renewable Energy markets as well as jacket installation, our service encompasses the pre-surevy, survey support for upend, piling, leveling and positioning of the structure.
The multi-disciplined nature and wealth of experience of our personnel in the subsea construction industry, allows our teams to be tailored to suit your project, whilst our management, engineers and personnel are encouraged to be innovative to find you the best solution; integrating with your existing teams, reducing costs and maximising safety throughout.

Construction Vessel Positioning

Subsea Positioning

ROV Positioning

Pipelaying and AHT Positioning Services

The co-operation and working relationship between all parties during all phases of this project has been a text book example of how to conduct survey operations etc.

Holland, Geoff

I just wanted to take the opportunity presented by the end of survey data acquisition activities to say thank you and well done on the excellent performance of the EGS team through the execution of the works to date. Whilst I’m mindful that there is still much to do in terms of tide gauge recovery, data processing and deliverable preparation – the performance of all personnel involved to date from EGS and Broadsword has been exemplary and particularly, the professionalism and attention to detail of the site team. It’s also been particularly pleasing to see this complicated and challenging scope completed in such a competent and hassle-free manner.

Rhys Jones

I would like to thank you for this excellent survey. Your team was professional and knowledgeable. It was a pleasure to work with them.

Philippe Hubert

On behalf of TOTAL E&P PNG and InterOil, we would like to express our gratitude for the efficient operation of the survey as well as safe and timely return to Port Moresby. It was a pleasure working with you all on the ground. We wish you all the best in your future endeavors.

Anton A Safronov

Veripos GNSS

C-Nav Technology

Survey Grade Gyrocompass

USBL Systems

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