Hydrographic and Marine Geophysical Survey Works

Hydrographic and Marine Geophysical Survey Works

  • MarineWorks01Hydrographic survey according to IHO standard.
  • Coastline delineation.
  • Inland survey for coastline and onshore features such as (buildings, minarets, Navaids, masts, roads, benchmarksetc).
  • Positioning of Navaids (Buoys, Beaconetc).
  • Performing transit sensitivity calculations for transit line designs.
  • Port and route survey maintenance.
  • Hydrographic studies.
  • Hydrographic survey and production of Nautical chart.
  • Offshore soil sampling.
  • Heights and leveling.
  • Tide predictions.
  • Geodetic calculations and coordinates conversions.
  • Digitizing and Geo Reference of all types of survey images in all formats.
  • Dredging calculation.
  • Survey data Post processing.

Field operations and Technique:

MarineWorks02

  • Coast lining and a land survey is executed by total station.
  • Collecting sounding data on main sounding lines which are planed according to IHO standards for bathymetric survey.
  • Data is collected on both main and cross check lines to produce the best cross section and seabed profile.
  • Tide Gauge or tide pole is used to collect the tide data during field work period, data is revised and validated.
  • Using the Admiralty Tide Program in order to determine the most accurate tide values.
  • Survey equipment are fully integrated with hydrographic software (Hypack Max).
  • Standard Calibration is carried out to DGPS & Echo Sounder before/after each working day (Cal in & Cal out).
  • Depths are reduced to chart Datum (CD).
  • Positions and all coordinates are referred to World Geodetic System 1984 (WGS-84) or any geodetic system required by the client.

Services Provided

DDIT Hydrographic Survey can produce the following products:

  • Bathymetric sheets.
  • Contour sheets up to 1cm interval.
  • Split contour sheets.
  • 3d view for the surveyed area.
  • Cross section view for the surveyed lines.
  • Arial Photogrametery of data.
  • Nautical chart production.
  • Side scan sonar mosaic.
  • Pre and post dredging calculations.
  • Comprehensive technical report.