Hydrographic and Marine Geophysical Survey Works

• Hydrographic 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:

• 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.