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SIDE SCAN SONAR (SSS)

BENTOS – Servicios y Equipos Marinos Ltda.

Avda. Suecia 3005, Ñuñoa, Santiago Telephone: (56 2) 296 373 60 Fax: (56 2) 296 373 77 E-mail: info@bentos.cl

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THE SIDE SCAN SONAR (SSS), WHAT IT IS

The SSS system, developed to create acoustic images of large areas of the surface of the marine bottom,consists of one of the variants of the original SONAR (SOund Navigation And Range) system, which searchesthe water column at high frequency (usually between 100- 900 kHz) by means of acoustic scanning to the

side and orthogonally in respect with the line of navigation. The restitution of the acoustic images makes itpossible to perform the mapping and characterization of bottom cover, the detection of objects or obstaclesfor navigation, inspections of submerged structures, exploration of shipwreck remains, the monitoring andinspection of maritime and port constructed works and submarine cables and pipelines (Benabdeloued et al .,2010).

BENTOS has the model 872 YellowFin SSS system by Imagenex, which operates on three frequencies: 260,330 and 800 kHz.

I m ag en ex model 872 Ye ll o w Fin SSS.

http://www.imagenex.com/

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THE SSS SYSTEM, HOW IT FUNCTIONS

Integrated on a tow fish structure, the sensor is towed with a communications cable linked to the controlsystem on board the tow vessel. The general principal of functioning of the SBL system features theemission/receiving of acoustic waves through the transducers at a characteristic frequency and directedtoward the marine bottom to insonify the surface of the marine soil in order to detect obstacles in the watercolumn. The signal is reflected in intensities that are proportional to the impedance or acoustic absorption ofthe bottom cover. This trait makes it possible to detect objects and infer differences in the impedance andtexture of the insonified bottom cover.

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PRINCIPAL APPLICATIONS

The characterization of the types of marine bottom surface covers have a wide range of applications in whichthe most requested include: reconnaissance of navigation hazards (rock outcrops and other obstacles),detection of objects on the surface (submarine cables and pipelines), submarine archeology (exploration ofshipwrecks), support for geotechnical exploration work, studies of cover distribution, sediment transport andgeologic features.

Example of the detection of rocks andcoarse sediment (boulders, gravel) locatedclose to the coastline by means of the sidescan sonar system.

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PRINCIPAL APPLICATIONS

Identification of a shipwreck by means of SSSacoustic imaging.

Reconnaissance of waves in sand on thesurface of the marine bottom by meansof the SSS system.

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PRINCIPAL APPLICATIONS

Example of reconnaissance of thesedimentary nature of the marineROCKY BOTTOM by means of the SSSsystem in the northern area of theChacao Channel, Chile.

SOFT BOTTOM

CONTOUR LINES

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PRINCIPAL APPLICATIONS

Example of the detection by the SSS system of the light cruiser SMS Dr esd en ,scuttled off shore from the coast of the Juan Fernández Archipelago, Chile.

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PRINCIPAL APPLICATIONS

Location of the shipwreck of the Corvette Esm e r a ld a by means of the I m ag e n e x 872 Ye l lo w F in in Iquique (B ENTOS, 2010).

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PRINCIPAL APPLICATIONS

Three-dimensional representation of the levels of acoustic activity of the marinebottom with So n ar W iz (Chesapeake), integrating SSS data ( I m ag en ex 872Ye l l o w Fi n ) and bathymetric depths acquired by means of high-resolutionmultibeam technology ( R2 Son ic ), Bahía de Concepción, Chile (B ENTOS, 2013).

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PRINCIPAL APPLICATIONS

Identification of elements and state of conservation of a shipwreck.

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PRINCIPAL APPLICATIONS

Submarine detection by means of side scan sonar images and the sonar shadowprojected on the marine bottom.

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EXPERIENCE

Official Multibeam Bathymetry, Marine Geophysics (Sub Bottom Profiler, Side Scan Sonar, Marine Magnetometryand Piston Corer), Puerto Lirquén, Bahía Concepción, Eighth Administrative Region. OCTOPUS LNG Project.GEOVENOR EXPLORA SpA. 2013.

Official Single Beam Bathymetry and Side Scan Sonar, Bahía Chapaco, Third Administrative Region, COMPAÑÍAMINERA DEL PACÍFICO S.A., (CAP-MINERÍA). 2012.

Marine Geophysical Exploration, Mejillones, Second Administrative Region, Gas Atacama Project,GASATACAMA CHILE S.A., 2011.

Marine Geophysical Exploration, First Administrative Region, Quebrada Blanca Project, Phase 2,COMPAÑÍA MINERA TECK QUEBRADA BLANCA S.A., 2011.

Shallow Seismic Survey, Bulk Liquid Terminal Project, Electroandina, Second Administrative Region, Chile.EMPRESA CONSTRUCTORA BELFI, 2011.

Official Single Beam Bathymetric Survey per the Hydrographic and Oceanographic Service of the Chilean Navy(SHOA), Caldera, Third Administrative Region, COMPAÑÍA CONTRACTUAL MINERA CANDELARIA,2010.

Exploratory and Side Scan Sonar Bathymetry, ASMAR (T) Harbor Basin Dredging Project, Talcahuano, EighthAdministrative Region, Chile. PRDW ALDUNATE VÁSQUEZ SERVICIOS LTDA., 2010.

Archeological Exploration by Geophysical Means of the Corvette Esmeralda Sunk in 1879 at Iquique, FirstAdministrative Region, Andrés Bello University, Chilean Navy and BENTOS, 2010.

Marine Geophysics Single Beam Bathymetry and Side Scan Sonar Studies and Directional Wave Measurements,Puerto Eten, Chiclayo, Peru, LUMINA COPPER, 2009 - 2010.

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EXPERIENCE

Submarine Power Cable Studies; Alignments in the Tenth and Eleventh Administrative Regions, Chile. TRANSELECS.A., 2009 - 2010.

Marine Geophysics Studies (SBP), Single Beam Bathymetry, Side Scan Sonar, Directional Wave Measurements;Puerto Eten, Chiclayo, Peru, LUMINA COPPER , 2009 - 2010.

El Morro Water Desalination Plant Project, Third Administrative Region, HALCROW GROUP LTD. CHILE, AGENCIAEN CHILE, 2009.

Marine Seismic Survey in Bahía Talcahuano, Eighth Administrative Region, GEOEXPLORACIONES S.A., 2009.

Hydrography, Geophysics, Beach Line and Coastal Topography Studies, El Morro Water Desalination Plant Project,Third Administrative Region, Chile, HALCROW GROUP LTD. CHILE, 2009.

Environmental Impact Declaration, Dredging to Deepen the Port and Material Extraction and Dredging SpoilDump Area for Dock 2B of Puerto de Arica, TERMINAL PUERTO DE ARICA S.A., 2009.

Study and Design for the Improvement and Maritime Connectivity of the Puerto Montt – Chiloé – Palena andCaleta La Arena and Caleta Puelche network, Tenth Administrative Region,PRDW AV – PORT WORKS ADMINISTRATION (DOP), 2008 - 2009.

Marine Geophysics Studies with SHOA Approval, Puerto Yungay and Río Bravo, CENTRALES HIDROELÉCTRICAS DE AYSÉN S.A.,2008 -2009. Geophysical Exploration Study for the El Galeno Project, Pacasmayo, Peru, MTB PROFESSIONALS, 2008.

Geophysical Study for the URUCU-MANAUS Gas Pipeline, Amazonas, Brazil, PLANAL SERVICOS DE ENGENHARIA,2008.

Consulting Services for a Submarine Routing Study – Conceptual Definitions for a HVDC Aysén – SIC GridTransmission System, CENTRALES HIDROELÉCTRICAS DE AYSÉN S.A., 2008.

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EXPERIENCE

Geophysical Exploration, Melchorita LNG Project, Peru. JAN DE NUL, 2008.

Geophysical Exploration, Punta Vegueta Area, Peru, TRAMARSA S.A., 2008.

Geophysical Exploration of Isla Riesco, Twelfth Administrative Region, Chile, GOLDER ASSOCIATES SERVICESS.A., 2007.

Reconnaissance of the Morphology of the Marine Bottom in the Zorritos Area, Tumbes, Peru, by means of theUse of Side Scan Sonar, Submarine Pipeline Project for Pipelining Gas, BPZ ENERGY INC., SUCURSAL PERÚ, SEHIDRO, 2006.

Bathymetry and Side Scan Sonar Studies at Roca Remolinos and North Pylon Area, Chacao Channel, TenthAdministrative Region, Chile, EMPRESA CONSTRUCTORA BELFI S.A., 2005.

Maritime, Wave, Current, Tide, Wind and Bathymetry Studies and underwater inspection for the “Short Seismic-resistant Dock for Post-Panamax Vessels, Berth 4 Project, Puerto de Iquique, First Administrative Region, Chile,IQUIQUE TERMINAL INTERNACIONAL S.A.,2002.

Maritime, Wave, Current, Wind, Tide and Bathymetry Studies, Side Scan Sonar and Magnetometry.International Concession for the Bridge over the Chacao Channel. Maritime and Wind Studies, Chacao, TenthAdministrative Region, Chile. Ministry of Public Works, CONSORCIO INGENIERÍA CUATRO LTDA. & COWIENGINEERS AND PLANNERS (DENMARK), 1999 - 2000.

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