The Teledyne Marine Channel

River sediment transport monitoring by means of H-ADCP.

Mon, 17 Jun 2019 08:53:50 GMT

Monitoring stations in rivers and water courses are an important mean to obtain critical data about the different variables that play a role in the hydrodynamics and ecological processes. This is especially true during rough weather conditions when direct observations are not possible and even dangerous. A technique to determine the suspended sediment transport by means of fixed ADCPs at the side of a river channel (i.e., H-ADCP) is here presented. This technique relies on the Channel Master by Teledyne-RDI which continuously measures water velocity and echo intensity profiles along an horizontal alignment, these measurements are then transmitted to a remote server via GSM. In addition the proposed technique is based on an acoustic method to investigate poorly sorted sediment in the spectrum ranging from clay to fine sand. This combines the measurement of sound attenuation and backscatter to determine instrumental sensitivity to actual matter suspended in the horizontal alignment, thus relaxing the need of frequent calibrations to account for changes in the backscatter return not ascribable to a change in suspended sediment concentration, SSC. Last but not least a Matlab GUI was developed for the acoustic method implementation-validation and its coupling with discharge assessment using water velocity profiles from the Channel Master.

The overall technique was applied in two very different case studies: i) the Devoll river in Albania that is a typical mountain stream with flow velocity and SSC larger than 5 m/s and 10 g/l during floods, respectively, in this case the monitoring serves hydropower industry; ii) the Secchia river where the observed peaks were close to 1.5 m/s and 2 g/l, this is the case of an embanked stream flowing in one of the most populous and heavily built areas of Italy where the monitoring station serves the prediction of sediments deposition and erosion close to existing infrastructures (e.g., bridge and levee).

Presenter:
Massimo Guerrero
LIDR-DICAM, Università di Bologna

Experimental verification of underwater noise localization based on...

Wed, 20 Mar 2019 13:58:27 GMT

To improve the stealthiness of underwater vehicles, or reduce impacts of vessels on the marine environment, it is necessary to identify their noise sources. Furthermore, the proper acoustic control and management of underwater noise radiation of vessels is critical during the intended upgrades and operational service.

Near-field acoustic holography (NAH) is a technology that acquires sound pressure in the vicinity of the hull, which can be back-propagated to locate the hot-spot on the hull and forward-propagated to predict the far-field radiated noise of the vessel. With OROS Underwater Holography software, which is the only underwater NAH solution in the market, the use of NAH for noise localization and far-field prediction will be presented through the findings from an experimental study on a large scaled model. Considering the typical shape of underwater vehicles, cylindrical NAH is adopted to provide the highest accuracy. A partial circular array consisting of 25 RESON hydrophones is placed in the vicinity of the hull to measure sound pressure. A shaker excited at random is mounted in the hull to simulate a source, whose location is known. The acoustic maps generated from the experimental measurements show good correlation between the hot-spot location and the known source location, verifying the correctness and efficiency of NAH technology in naval applications.

Presented by:

Guillaume Cousin
Oros

ADCP Data QA: Overview to Advanced (Oceanographic)

Fri, 15 Mar 2019 09:02:04 GMT

Outline

Overview of the ADCP Data Types
Methodology for Data Reviewing: Key Data Quality Indicators
Review of Example Data Sets from WH and Sentinel V ADCPs – Learn Data Displays: 2D Profiles, 2D Time Series, 3D Profiles, and 3D Time Series

Presenter:
Darryl Symonds
Teledyne Marine

Vessel Mounted ADCP: Installation Background, FAQ’s, and a case study of an...

Fri, 15 Mar 2019 08:59:24 GMT

Outline

Go to: Vessel Mounted ADCP Requirements >
Go to: TRDI System Package Overview >
Go to: Example Vessels and Installations >
Go to: Block Diagram of ADCP Installations >
Go to: Do’s and Don’ts of ADCP Installation (Frequently Asked Questions) >
Go to: Vessel Mounted Data Acquisition Software (VMDAS) >
Go to: 2 Stories of ADCP Vessel Mounted Data Collection >

Presenter:
Darryl Symonds
Teledyne Marine

IDH T-50, BV5000, and LiDAR Mobilization on a Fast Response USV for Canal...

Fri, 08 Feb 2019 09:25:32 GMT

The California Aqueduct is the principal water-conveyance structure of the California State Water Project. From the Sacramento River delta east of San Francisco, it runs south 444 miles (715 km) and is the world’s largest water-conveyance system. Channel sizes vary along the aqueduct, varying from 40 feet (12 meters) to 150 feet (45m) wide at the base, with 30 feet (9 meters) average depth of flow. Additionally, with its unique mixture of over chutes, under chutes, and utility crossings, it has a height clearance limit of 24 inches (0.60cm). Constructed starting in 1960, there are concerns that fluctuating land-surface elevations due to subsidence and uplift in the valley could cause serious operational-maintenance and design construction problems for the California Aqueduct surface-water delivery system. As a result, the California Department of Water Resources has undertaken this study to develop a greater understanding of the location, extent, and magnitude of subsidence along the California Aqueduct, as well as to help understand the relationship of groundwater levels and land subsidence. Since 2005, there have been three unsuccessful attempts to field test a vehicle capable of transiting the canal system with minimal need to recover the vehicle, while having the ability to carry high-resolution multibeam and LiDAR sensors. In December of 2017, Seafloor proposed the development of a 15 foot (4.5m) catamaran vehicle, capable of 8 hours endurance, less than 60cm in overall height, and capable of carrying an IDH T-50 multibeam and high resolution LiDAR sensor. This presentation will produce the results of that program.

Presented by
John Tamplin
Seafloor Systems

Survey, dredge monitoring, search and removal of objects and disposing of...

Thu, 07 Feb 2019 11:43:59 GMT

-Short presentation of the Port of Antwerp

-Short presentation of the our surveyvessel "Echo"

Built and tasks

-dredging and processing contaminated mud, how we deal with it.

Presenter:
Kurt Stuyts
Port of Antwerp

Use of AUV in shallow water, return of experience and expectations.

Wed, 16 Jan 2019 11:20:26 GMT

Using AUV since 2014 for shallow water survey mainly in West Africa in some of the most difficult area; zero visibility up to 4.5Kts surface current, ... We perform all the type of survey required by O&G offshore construction (pre-lay, as-laid, as-build). Taking advantage of acquired experience , we are now having some expectation for the near future.

We will also show the use of BV5000 as used in Niger delta for metrology purpose.

Presented by:
Eric Guilloux
Saipem

Survey and positioning in windfarm construction - the next level

Wed, 16 Jan 2019 11:14:19 GMT

Showing the importance of using high grade survey equipment in reducing installation cost and time, as well as where survey plays a part where you least expect it, for example, when upending a monopile.

Learn more about Teledyne Marine dredge and construction solutions>

Presenter: W. Kanneworff

Van Oord Offshore Wind

Current and future applications of acoustic scanning in marine engineering...

Tue, 15 Jan 2019 08:29:01 GMT

The study highlights the advantages of using acoustic scanning in the survey of key walls, piles, defensive and other civil marine engineering structures, addresses existing and potential problems with this method and suggests a direction for future improvement. It is based on the summary of 25-year experience of marine engineering surveys by GT Corporation SE (Estonia) and its partners, with 10-year experience in acoustic scanning. The key distinction of mentioned application is in very rigorous quality requirements for engineering surveys, very small size (0.5-2cm) of details required, as well as technical problems of scanning vertical structures with high reflective capabilities due to high inclusion of metal components. An additional difficulty are the weather conditions and water qualities specific to the Baltic Sea. To solve this task, the company and its partners use multiple Teledyne products, including PDS software, Seabat T20, Seabat T50, Blueview scanners, all of which will be mentioned during the report with examples of use. Based on the multiple use cases, potential future applications, and expanding engineering survey market it can be seen that a specialized new scanner product type specifically designed for engineering surveys can be used to provide even more informative and higher quality data to potential customers.

Presenter:
Igor Burovenko

GT Corporation SE

The application of Teledyne RESON products in coastal area dredging works

Mon, 14 Jan 2019 14:36:33 GMT

Dutch Dredging is using many Teledyne Reson products integrated in its vessels dredging systems. This presentation focusses on Teledyne Reson products that mix effortlessly in existing dredging systems, but also on what it can offer in the construction of new vessels.

How

Result

Conclusion

Presenter:
Wilhelm Roth

Baggerbedrifjt / Dutch Dredging

USV (Unmanned Surface Vehicle) RSV Sea Observer deploying the Seabotix ROV...

Mon, 14 Jan 2019 14:02:53 GMT

For some years now, autonomous vehicles achieve more and more hydrographic survey operations. Their fields of action are becoming more extended and they allow reducing the costs of this type of intervention in comparison with conventional survey means.

If typical marine survey can be now well achieved thanks to USV, from inshore and coastal areas to open oceans and offshore bathymetry, the autonomous and remote monitoring of sensitive submarine works and subsea observation, in particular in congested areas and hazardous environment, are challenging.

More and more marine works companies faces to this issue, including in the offshore oil and gas sector, such as NPCC in UAE (National Petroleum Construction Company).

This is to answer this gap, that Marine Tech, a French-based company, developed the RSV Sea Observer, equipped with Teledyne Seabotix ROV vLBV300: the first USV deploying ROV (Remote Operated Vehicle) for coastal and offshore missions.

This project led up to the development of motorized winch integrated onboard the USV deploying the ROV vLBV300 up to 100m water depth and umbilical tensioning system providing a perfect winding. Coupled with an articulated platform at the back of the USV, the ROV is launched and recovered easily and safely and protected during transit.

The communication between ROV and RSV was part of the development, as well as the autopiloting with Dynamic Positioning of the USV, with relative acoustic positioning (USBL) ensuring ROV tracking.

This new generation of USV has capabilities for both coastal offshore survey autonomously, thanks to sonars (multibeam echosounders and side scan sonars), and also for subsea visual monitoring and inspection thanks to the ROV.

Presenter:
Thierry Carlin

Marine Tech Sas

Deploying lightweight ROVs for EOD operations

Mon, 14 Jan 2019 11:31:17 GMT

Rapid technical advancement has seen a move away from more traditional methods of sub- sea operations, such as the use of divers, in favour of using unmanned and remote vehicles. Remotely Operated Vehicles (ROVs) are now being extensively used in offshore and military operations for complex inspection tasks, and Dynamic Positioning (DP) software is used to reduce operator workload, provide stability to the mission platform, and allow for repeatable, automated tasks and inspections. Building a custom ROV system from the ground up is often stifled by high research and development costs and a relatively small market size for these specialized tasks.

One way to efficiently move into unchartered waters, so to speak, is to create a specialized system composed of existing commercial off the shelf (COTS) hardware and software components – effectively creating a vehicle that is more than the sum of its parts.

This presentation will discuss the challenges of designing a non-standard ROV system comprised of the best of breed vehicle hardware, sensor, and software systems that the market has to offer, regardless of manufacturer. Under the leadership of Space and Naval Warfare Systems Center Pacific (SSC Pacific), SeeByte collaborated with Teledyne SeaBotix and HDT to develop several smart ROV systems that are able to perform a range of capabilities and functions – including active intervention with underwater improvised explosive devices (IEDs) and IED neutralization. This project proved that custom ROV configurations can be created for some of the most challenging applications with the right software acting as the glue between the different hardware components.

Presenter:
Chris Haworth
SeeByte

An experience in using ADCP “Rio Grande 600 kHz” for investigations of the...

Wed, 09 Jan 2019 13:17:21 GMT

During several expedition seasons, starting from 2003, TRD Instruments- Europe provided us with ADCP Workhouse “Rio Grander 600 kHz” gratuitously supporting our studies at shelves of Russian seas. The first studies showed that the instrument designed for measuring sea currents can really have a much broader spectrum of functions. Primarily, it is true for measuring the intensity of the back-scattered signal, that feature allowing one to monitor different processes in the water bulk. In combination with simultaneously monitoring the background current, the ADCP becomes an exceptional instrument offering unreachable earlier possibilities in studying the processes in coastal regions of seas.

Presenter: Lisa Khimchenko
Repaired by: Andrey Serebryany, Shirshov Institute of Oceanology