Aug 17th, 2012

Side-Scan Sonar:

This is an acoustic device which employs sideways looking transducers fitted to a towfish.  The sonar allows the seabed features within a 50-300m swathe to be mapped.  Sidescan sonar is particularly useful in identifying features such as rock, sandwaves, etc. and can also be used in search operations, archaeological survey and for the inspections of pipelines for suspensions.

For detailed short range (<50m) work a 500kHz fish is best.  A lower frequency (100kHz) gives a greater range but with reduced resolution.  The accuracy and resolution depend on the range to a particular target and speed of vessel.  With care it is possible to resolve features of <100mm width. 

Sidescan image showing sandwaves

Click to Enlarge Sidescan image showing Piles

Click to Enlarge Sidescan Towfish

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Sidescan image showing sandwaves Sidescan image showing Piles Sidescan Towfish
Outfall Pipeline

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Outfall Pipeline


Our Services include: Hydrographic surveys, Bathymetric surveys, Sidescan surveys, Lunar Clocks, Magnetometer surveys, Geophysical surveys, Sub-bottom surveys, Dye surveys, Drogue surveys, Current surveys, Wave surveys, Tide surveys, Echosounding surveys, Marine Outfall Studies, Tide Tables, River Studies, Dredging & Disposal, River Studies, Facilities Planning, Shoreline & Inter-tidal Topographic Survey, Flood Level Studies, Contamination Dispersion.

Irish Hydrodata Ltd., Ballygarvan, Co. Cork. Ireland.        Tel: +353 (0)21 431 1255        Fax: +353 (0)21 431 1740        email us

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