What Is Cable Lay Survey Support

Cable Lay Survey Support is a trenchless method to bury cables or pipes. The machinery is a form of a subsoiler with a single blade. It is used to lay buried services of virtually any description, for drainage, water, electricity, telecommunications, gas supply etc.. A coil of the service pipe/cable is mounted on the tractor and is led down a guide behind the blade, and is left buried behind the plough, without the need to dig a deep trench and re-fill it.

Our services of survey support for cable divide in three stage :

(a) Pre Survey Desk Study

The purpose is to develop optimized routing between defined landing sites that meets economic and technical viability criteria including

  • Avoidance of or minimizing conflicts with other seabed users
  • Minimizing exposure to natural and manmade risk and hazards
  • Optimizing cable engineering and protection
  • System maintainability

Summary of the typical scope of a cable route desk top study:

  • Visit potential landing sites to assess the engineering requirements, then meet with local representatives of relevant marine authorities and visit industry representatives and other entities whose actions may affect the integrity of the cable (e.g. fishing, shipping, planning and port authorities).
  • Research bathymetry, seafloor and shallow seabed lithology, currents, weather, seismology, tides, permits, other seabed users, fishing, and shipping.
  • Identify areas of potential difficulty for survey, installation and subsequent maintenance.
  • Investigate and detail environmental and cultural factors relating to the cable route, highlighting relevant statutes and regulations of the various authoritative bodies.
  • Identify possible sources of risk to the cable – and the extent of that risk for the cable system.
  • Identify permits, licences and other regulatory requirements necessary to install the cable and for the cable to remain in situ along the proposed route.
  • Recommend routes that do not conflict with existing subsea infrastructure.

(b) Route Survey and Burial Assessment

By collecting Multibeam bathymetric data, Side Scan Sonar imagery data, Subbottom profiling data and Burial assessment data (Gravity Coring and Cone Penetrometer test) the information below can be describe:

  • To confirming or amending the preliminary pre survey Desk Top Study route.
  • Define and documents the final route.
  • Enable final cable engineering to be defined.
  • Identified potential post installation/residual hazards including unmitigated risk from potential tectonic activity during the system design life.

(c) Cable laying Positioning support

To support in navigational and guide for cable lay activity.

Looking for a quality constructor for your next project?