Marine Geophysics Surveying | Marine Geophysical Surveyors

It is very important to know what is below the seabed before most projects (particularly construction and dredging) can commence. For example, determining the locations, areas and depths of hard rock could save significant time and money in a project’s planning phase.

Marine geophysics is the discipline of measuring the properties of materials below the seafloor.  This includes employing magnetic and acoustic techniques for finding the location and depth of a buried object or interface, as well as gaining knowledge of the properties of these sub-bottom features.

We can accurately locate and measure sub-bottom depths for the following applications:

  • Locating fuel lines
  • Locating electricity cables
  • Locating rammed bride piles below the water – sediment interface
  • Pre-cable burial surveys to locate rock and hard materials below the sea bed that may inhibit trenching
  • Pre-dredge surveys to locate any materials that may inhibit a particular dredging technique
  • Sub-bottom surveys for the placement of anchors or alternative energy platforms (wave and wind generation facilities) 
  • Position and burial depth of communication cables 

We employ the following equipment to undertake these works:

  • High resolution sub-bottom profilers (Up to 5 metres sub-bottom penetration with resolutions in the centimetre range)
  • Towed Boomer system (Up to 30 metres sub-bottom penetration with resolutions in the decimetre range)
  • Towed Sparker system (Up to 100 metres sub-bottom penetration with resolutions in the metre range)
  • Magnetometer (Geometrics G-882 model) (Cesium Vapor type with highest data rate and sensitivity on the market)
  • Surface wave data collection system (For determining material properties of sediments such as Bearing Capacity)

 

High Resolution Sub-botaom Data2