Autonomous Vessel Delivers in Challenging Environment

Track Record Built During Shallow Water Survey
The hydrographic survey industry is changing and moving away from manned operations in an effort to reduce costs and increase safety. During the Shallow Water Survey 2015 conference this new approach and the associated challenges were assessed by Swath Services during the collection of ‘The Common Dataset’ associated with the conference. The aim of participating with an Unmanned Survey Vessel (USV) was to determine if it was actually possible to undertake such a high specification challenge with a USV. The common dataset provides a benchmark against which the performance of the USV can be measured. For 2015, The Common Dataset... (read more)
2016-07-26 12:01:22

Project SHOA, Waves in Chile

40-year wave climate model for the Chilean coastline
A detailed study of swell wave conditions in the southern Pacific Ocean has been performed, with particular emphasis on the western Southern American coastline. This study was one part of an overall wave hindcasting investigation undertaken for the Servicio Hidrografico y Oceanográfico de la Armada de Chile (SHOA) to define the inshore wave climate at various locations along the Chilean coastline. Chile is a long, relatively thin country that stretches along the western edge of the Southern American continent, as may be seen in Figure 1. It experiences large meteorological variability along this length. The climate varies from arid desert... (read more)
2008-01-01 01:00:00

A Note on Fifty Years of Multi-beam

The Early Years
The year 2013 marks the Fiftieth Anniversary of the first installation of a multi-beam sonar sounding system. A review of the early development of multi-beam sonar systems follows. On 1 May 1960, a United States U-2 spy plane flown by Francis Gary Powers was shot down over the USSR by a Russian Dvina surface to air ­missile. This event, although it would seem not to be related, led directly to the development of multi-beam sonar according to the autobiographical memoir, Lazarus: From Seven to ­Seventy by Eugene Weisberger, then general manager at General Instrument. The U-2 had flown spy missions over the... (read more)
2013-05-22 04:51:42

Monitoring Marine Pollution

Detecting Offenders by Satellite in the Eastern Black Sea
An increase in marine traffic has recently been registered in the Black Sea, which is often accompanied by illegal oily water dumps, leaks during loading/off-loading operations and a higher risk of accidents. One of the primary tasks of ScanEx Research and Development Center is the operational satellite-based monitoring for real-time detection of oil spills and their sources. Repeat offenders of waste dumping and sources of pollution have been confidently identified, encouraging others to adopt a more responsible attitude towards the marine environment. View Larger Map According to statistics, transportation is the main source of world ocean pollution. This is also... (read more)
2009-05-12 12:00:00

Can I Communicate with My AUV?

Performance and Challenges in Shallow Water
The prospects for an increased future use of autonomous underwater vehicles (AUVs) in the Maritime & Offshore sector are high, mainly due to the search for cost effectiveness. AUVs reduce the need for large crews, divers and vessels in the operational area. AUVs are already operational for bathymetric and environmental mapping, pipeline tracking and mine hunting, and there is a trend towards their use for inspection and environmental monitoring. When using non-tethered solutions, underwater communication becomes crucial for data transfer, positioning and even more given that the long-term goal is the deployment of multiple autonomous vehicles, possibly working in a... (read more)
2016-07-26 11:12:41

What’s Down Below??

Why ROTVs are Useful Tools in Answering This Question
Early in the first quarter of 2007, Noordhoek Survey took delivery of two MacArtney Focus-2 Remotely Operated Towed Vehicles (ROTVs). The expectation was that the new ROTVs would be a valuable addition to the existing fleet of underwater vehicles. Now, half a year and hundreds of survey kilometres later, these expectations have proven to be correct.<P> Over the past 15 years, Noordhoek has gained valuable experience in ROV and towfish surveys. The new Focus-2 ROTVs fill the gap that used to exist between the specific competences of these two survey platforms. The ROTV body (1.25x1.25x1.85m) consists of four carbon-fibre hulls,... (read more)
2007-11-27 12:00:00

Improving Uncertainty Visualisation in ENCs

Towards a Better Portrayal of Bathymetric Data Quality for Mariners
The visualisation of bathymetric data and associated uncertainty in electronic nautical charts (ENCs) is important when it comes to planning and monitoring a ship’s route safely. However, a study confirmed that the current uncertainty representation is not very intuitive and does not provide clear orientation for mariners. To improve this situation, Fraunhofer IGD proposed novel visualisation solutions for the next-generation S-101 ENC standard. Read on for a summary. Electronic nautical charts (ENCs) are common tools for safe navigation at sea. By providing information concerning water as depth zones, contours and spot soundings, they support mariners in planning routes, which maintain... (read more)
2017-02-01 09:33:04

Marine Data Accessibility and Use

Following recognition that there could be greater collaboration between government and industry sectors to improve access to marine data and information, a workshop was held to identify current issues and propose how such improvements could be made. Several key recommendations are being taken forward to ensure that plans to establish a national framework for the management of marine data in the UK are being met for all sectors and that the data requirements for a national marine monitoring and assessment strategy are met. This article provides information on existing marine data initiatives, describes the current issues, areas for potential improvements,... (read more)
2008-03-01 12:00:00

Quality Control of Survey Data

A Continuous Process?
Quality control of survey data is an integral part of any hydrographic survey or inspection operation, but the focus is too often concentrated on the wrong sensors, the carrying out of unnecessary comparisons and ultimately burying real issues in a flood of confusing and contradictory error messages, print-outs and alarms. So what is meant by quality control of survey data, why do we need it, how should we measure it and when is the best time to carry it out? ‘Quality’ is a phrase often used and is expected to be highly visible in the literature and mission statements of... (read more)
2013-09-06 04:37:34

The Seabed Survey Data Model

An Industry Data Model for Managing Seabed Survey Data
Exploration and Production (E&P) companies spend millions of dollars every year undertaking seabed surveys to acquire data to help in many exploration and production activities such as: determining potential well locations, identifying geophysical hazards (geohazards), the selection of potential pipeline routes and offshore facility locations, and asset maintenance. E&P companies utilise hydrographic survey companies to collect, process and deliver seabed survey data to improve project planning and manage risk. However, to extract the true value from the acquired data there is a need to ensure consistency in how the data is structured and delivered so that it is more efficiently... (read more)
2011-09-08 02:24:40
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