Geophysical Survey

Offshore Positioning

Geotechnical Survey


Geophysics is an essential tool for the detection and understanding of variations in the properties of the Earth, geological structure, and for the identification of potential geohazards. The understanding of the geology and geological processes active within an area can have significant implications for locating infrastructure, for safety in its design and design optimization, and for potential time and cost savings associated with its installation.

 The applications of marine geophysics are as varied as the techniques and instruments that have been developed for surveying the sea floor , examples of equipment used at geophysical surveys are :

  • Multi Beam Echo sounder
  • Side scan sonar
  • Sub Bottom profilers
  • Magnetometers
  • Cable & pipeline tracking
  • Pingers & Boomers

Geotechnical Survey

Offshore Positioning

Geotechnical Survey


 Geotechnical investigation, comprising sampling and in situ testing, provides ground truthing at specific locations and is, therefore, a key input into ground model development .

 We have the capability to acquire marine geotechnical data up to 20m below seabed in water depths of up to 3000m using a range of equipment including:

  •  Seabed penetrometers (CPTs)
  • Vibrocorers
  • Piston corers
  •  Box corers 
  • Clam shell grabs 
  • Full range of smaller environmental grabs & trawls. 

 We have our own in-house team of marine geotechnical surveyors & technicians to operate and maintain all geotechnical sampling & coring equipment which can be deployed from any third party vessels .

Offshore Positioning

Offshore Positioning

Offshore Positioning


 Offshore site surveys require the positioning of a survey platform (survey vessel, underwater vehicle or towed body) with a high relative accuracy. This accuracy depends on the purpose of the survey but lies normally between 0.5 m and 5 m. 

Examples of positioning operations are:

  • Rig Positioning.
  • Barge positioning.
  • Jacket installation.
  • SPM positioning.
  • Diving support vessel positioning.
  • Construction support vessel positioning.
  • Underwater positioning using USBL and LBL.
  • Metrology using LBL.

ROV Inspection

Bathymetric survey

Offshore Positioning


 Our professional ROV Inspection Teams give asset owner/operators a proven, responsive and cost-effective underwater inspection and integrity management partner.

MESC experienced and professional ROV Teams deploy high-spec Mini-ROV technology and tooling to inspect floating production assets, drilling assets and other offshore/marine vessels and structures. We pride ourselves on being agile, mobile, responsive, knowledgeable and extremely Cost-Effective. 

Subsea - Oil & Gas applications:

  • Subsea Structure Inspection & Work.
  • FPSO Rigs, Hull Inspection & Cleaning.
  • Hull and Vertical Structures expertise.
  • Inspection of Immersed Structures.

Bathymetric survey

Bathymetric survey

Bathymetric survey


 Bathymetry is the study of the bed (floor) of a waterbody, involving mapping of features on charts to provide information on water depth. Bathymetric charts are typically produced to aid navigation and inform dredging activities, for example during maintenance of navigational channels, Examples of Bathymetric survey operations are:

  • Nearshore survey.
  • Shallow water survey.
  • Channels survey.
  • Port survey.
  • Site survey.

Bathymetric surveys can be conducted by using Single beam echo sounder or Multibeam echo sounder to generate Bathymetric charts and contours.

Pipeline Survey

Bathymetric survey

Bathymetric survey


Various methods can be used for pipeline route allocation using survey equipment from survey vessels or work class ROV's.

pipeline route detection and profile can be done using usual survey sensors as Multibeam echo sounder, side scan sonar and pipe trackers.

Pipelines surveys include but are not limited to:

  • Pre-lay Survey
  • Post-lay Survey
  • As-laid Survey
  • Touch down monitoring

The ROV can carry instrumentation to

monitor the cathodic protection given by sacrificial anodes attached to the structures and pipelines.  Should any pipeline be buried then a PipeTracker can be used to locate its position. This is a sophisticated underwater metal detector which uses sensing coils to detect the magnetic field changes caused by the steel pipe.

Seismic Survey

Seismic Survey

Seismic Survey


 Seismic surveying is a technique used to explore the layers of rock below the seabed for geologic features that indicate the presence of oil or gas. Seismic waves are generated from a surveying vessel, travel down through the water and seabed and reflect back off the different layers of rock. This information is used to produce maps of structures identifying areas where gas deposits may be found 

  There are three basic types of seismic technologies used to help explore for oil and gas – 2D, 3D and 4D , Seismic survey services include but not limited to: 

  • Life of Field Seismic (4D).
  • Ocean Bottom Seismic.
  • Portable Seismic Source.
  • Project Management.
  • Marine 2D Data Acquisition.



Metocean Monitoring Systems

  • Full water column oceanographic data acquisition, including current velocity and direction, wave spectra, tides, conductivity, and temperature (shallow waters to ultra deep waters).
  • Meteorological stations, including wind, temperature and visibility
  • Design, installation, and maintenance of tide stations for ports, exploration, and survey programs.
  • Integration of instrumentation and sensors through buoy-based systems or fiber networks utilizing sophisticated data processing, web display, storage, and dissemination software.
  • Conception, design, installation, and maintenance of metocean mooring programs for offshore resource exploration and development, subsea and coastal infrastructure, engineering, and design criteria.

Service Brief

 MESC  offers long term onshore and offshore operations and maintenance of meteorological stations to record atmospheric parameters, water levels, tides, currents, waves using state of the art oceanographic and meteorological sensors. 

MESC offers real-time data display through bespoke web applications. Data is then used by scientific communities for modeling or by private companies to plan for future developments.




MESC is an environmental consulting company that is flexible and adapts to its customer requirements, providing nearshore and offshore integrated solutions.

We offer integrated solutions to our clients by performing the necessary survey works plus all the required environmental measurements and assessments. MESC combines biological knowledge and environmental background with know-how and proven experience on geophysical, hydrographic and base line surveys.

Environmental solutions includes but not limited to:

  • Water sampling.
  • Waves monitoring.
  • Tidal information.
  • Soil sampling.
  • ADCP surveys
  • Lab analysis. 

Service Brief

Focused on coastal and marine environments, these services support infrastructure planning, consenting and development, environmental protection and resource management.