Sonar Articles

  • Zhenjiang Dantu District Jiangxin application case - Case study

    project background :By the CCCC Shanghai airlines courtyard entrusted, Surveying and mapping profile per 50 meters for 4 kilometers north gulf and Extension of 50 meters area of Zhenjiang Dantu District Jiangxin. Equipment: ME70 Fully automatic Surveying and mapping unmanned ship、ODOM single wave Beam echo sounder ...


    By Oceanalpha Co., Ltd.

  • The area measurement application case of the South China Sea - Case study

    Project background;Delegated by Oceanic administration of the south China sea branch, ME120 together with ship team leave for South China sea to carry out measurement task. Equipment: measurement USV(ME120),The single beam echo sounder HY1601; Result; Finished 100KM, several area depth of water ...


    By Oceanalpha Co., Ltd.

  • At what Speed is Greenland’s Ice Sheet Melting?

    Greenland – Overview Greenland is an island and autonomous Danish territory located between the North Atlantic and Arctic Ocean. Most of the land is covered by a massive ice sheet. In fact, this ice sheet is one of the only two existing on this Earth. The other ice sheet covers Antarctica. The Greenland Ice Sheet (GrIS) covers approximately 81 percent of Greenland. This ice sheet is ...


    By Climate Institute

  • Low Visibility Diving – A look at Sonar Integration

    Updated sonar technologies are making low visibility diving possible – making them the ideal tool to be equipped on underwater drones for Search & Rescue missions and salvage operations. Unless you are swimming off the coast of Cancun, your nearest water source may not always be incredibly clear. Visibility below the surface often limits the ability of search and rescue missions ...


    By Deep Trekker Inc.

  • Large area search and recovery tactics

    A glimpse into large area search and recovery tactics and how Remotely Operated Vehicles have aided in missions. It may seem like an impossible task as you glare over a large body of water; knowing that someone has gone missing beneath the alluring surface and it is your mission to find them. Sadly, this scenario takes place often for search and recovery ...


    By Deep Trekker Inc.

  • Advancing Omics Research and Reducing Bias with New MS Technology for Data-Independent Acquisition Experiments

    Targeted LC-MS based assays are increasingly applied in the post-discovery Omics area with an emphasis on validation, the first of many phases in translational research; and in studies that are aimed at gaining the understanding of biological systems in terms of drug development and treatment. Understanding the context of analytical results is driving current research, and therefore driving the ...


    By Waters Corporation

  • Views from Inside Pearl Harbor’s USS Arizona

    Deep Trekker ROVs Provide Survivor First Live View Inside USS Arizona This year marks the seventy-fifth anniversary of Pearl Harbor and the sinking of the USS Arizona. Unlike most other ships that were bombed on that fateful day, the steel battleship suffered so much damage that it was never salvaged. The final resting place of over 900 souls, the ship has remained submerged in a shallow ...


    By Deep Trekker Inc.

  • Sound Absorption for All Saints Church Community Centre

    Acoustic specialists, Sound Reduction Systems (SRS Ltd) were approached by All Saints Church with a view to treating the poor acoustics within their community centre. They had recognised that high levels of reverberation and echo were affecting the various groups that used the space, and were looking for a solution that was both effective and decorative. Initially, Mr Les Munns (Church Building ...


    By Sound Reduction Systems Ltd

  • All I Want For Christmas is low CO2 – how Analox do Christmas lights

    It’s the most wonderful time of the year, and the team at Analox have taken a different step into Christmas with this year’s Christmas lights. There are several Christmas trees dotted around the Analox office, and at first glance they look like normal trees with normal decorations. However if you look at them closely, you will see that all the lights flash ...


    By Analox Sensor Technology

  • Permanent Monitoring Systems for Seabed Leakage Detection

    Seabed leaks Where do they come from? Natural vents: Faults, Pockmarks, and Chimneys Melting hydrates Shallow gas layers Long term leakage along well casings (cracked cement) Injection: fault re-activation/fracturin Lost well control nd failing barriers The mysterious pockmarks at the ...


    By Franatech GmbH

  • Interview with Ronald Ebelhar, 2015 Chairman of the ASTM Board

    Ron Ebelhar has provided leadership in civil engineering projects and ASTM technical committee work since the 1970s. This year, he brings his experience to his elected position as chairman of the ASTM board of directors. You have worked on dozens of engineering projects since getting your degrees in civil engineering. What are some of the most interesting and challenging jobs you ...


    By ASTM International

  • The importance of wastewater force main management

    Condition assessment and management of wastewater force mains has historically been challenging for operators. Conventional methods (e.g. visual inspection, sonar and laser profiling) do not provide a comprehensive condition assessment because they do not quantify the loss of structural capacity. As WEFTEC 2013 in Chicago approaches, ...


    By Pure Technologies

  • Alum creek large diameter sewer assessment case study

    The Challenge The City of Columbus, like many municipalities, must make hard decisions on where to spend their limited capital improvement dollars. In tight economic conditions, a municipality’s decision to monitor, rehabilitate, or replace their assets is not cut and dry. Deferred maintenance of non-critical assets in one department may give other departments the monetary resources ...


    By Chester Engineers

  • Locating pipes and cables case study

    GPR can be used to determine the location and depth of metallic, non-metallic, plastic, concrete and asbestos-concrete utilities, and cables (power, signal, etc.) Locating of  City Utilities The VIY3-300 GPR was used for locating of city utilities (water, gas, sewer, etc.). This profile shows city utilities at a depth of 1.2 and 2.0 meters (wave speed is 130 meters per ...


    By Transient Technologies LLC

  • Metabolic profiling of biofilm bacteria known to cause microbial influenced corrosion

    This study builds upon previous research that demonstrated the simplicity of obtaining metabolite profiles of bacteria in urban water networks, by using the metabolic profile of bacteria extracted from a reticulation pipe biofilm, which is known to cause microbial influenced corrosion (MIC). The extracellular metabolites of the isolated bacteria, and those bacteria in consortium, were analysed ...


    By IWA Publishing

  • Understanding the spatial formation and accumulation of fats, oils and grease deposits in the sewer collection system

    Sanitary sewer overflows are caused by the accumulation of insoluble calcium salts of fatty acids, which are formed by the reaction between fats, oils and grease (FOG) and calcium found in wastewaters. Different sewer structural configurations (i.e., manholes, pipes, wet wells), which vary spatially, along with other obstructions (roots intrusion) and pipe deformations (pipe sags), may influence ...


    By IWA Publishing

  • The Importance of Wastewater Force Main Management

    Condition assessment and management of wastewater force mains has historically been challenging for operators. Conventional methods (e.g. visual inspection, sonar and laser profiling) do not provide a comprehensive condition assessment because they do not quantify the loss of structural capacity. As WEFTEC 2013 in Chicago approaches, ...


    By Pure Technologies

  • A machine learning approach for estimation of shallow water depths from optical satellite images and sonar measurements

    There has been a rapid growth in the field of remote sensing and its various applications in the area of water management. Nowadays, there are several remote sensing techniques that can be used as a source to derive bathymetry data along coastal areas. The key techniques are: sonar (sound navigating and ranging), LiDAR (light detection and ranging) and high-resolution satellite images. The ...


    By IWA Publishing

  • Numerical investigation of entropy generation in an unsteady flow through a porous pipe with suction

    This paper investigates the entropy generation rates in an unsteady flow of a variable viscosity incompressible fluid through a porous pipe with uniform suction at the surface. The nonlinear governing equations for momentum and energy balance are derived and solved numerically using a semi–implicit finite difference scheme in order to obtain the fluid velocity and temperature profiles. Numerical ...


    By Inderscience Publishers

  • Finding the needle in the hay stack - tracing seabed gas seepages using hullborne multibeam echo sounder, and AUV based sonar and optical systems case study

    Scientific objective A better understanding of the shallow geological systems in the Barents Sea with particular attention to fluid flow Specific objectives Identify regional spatial distribution of gas flares within an area of 3000 km2 in the Barents Sea Identify and describe associated structures (i.e. pockmarks, carbonate reefs) using ...


    By Franatech GmbH

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