Invited Reply

Hydrography or Hydrogeomatics?
In common with all sciences, hydrography too is undergoing rapid change with regard to data acquisition and processing, instrumentation, application and many other aspects. Differing ideas may be found within the hydrographic community concerning these developments, which direction to take, change in the nature of the science, etc. and some opinions are to some extent controversial. Hydro international would like to draw attention to such diverse opinions when and in whatever context they arise by modifying her traditional interview in this issue by a column entitled ‘Invited Reply’. The pertinent question will here be answered by six prominent figures from... (read more)
2008-01-01 01:00:00

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

"Running Costs of Research Vessels Differ between Countries"

Hydro International Interviews Dr Klas Lackschewitz, GEOMAR; Chairman ERVO Group
Operating research vessels is an important aspect of many hydrographic and oceanographic organisations. The European Research Vessel Operators (ERVO) Group coordinates small to medium-sized research vessels in Europe. This platform provides an opportunity to exchange experiences on issues or problems related to research vessel operators and new developments (and new-build vessels) and to share best practices. 'Hydro International' has interviewed Dr Klas Lackschewitz of GEOMAR, Germany, and chairman of the ERVO Group for 2017-2019 about the organisation and its efforts. ERVO Group is optimising the use of capacity of small and middle-sized research vessels. What do you consider as minimum and... (read more)
2017-08-30 01:59:19

INS and DVL for Out-of-Straightness Surveying

Inertial and Doppler, the Perfect Combination for 3D Pipeline Buckle Surveys
The move to deeper water, the proliferation of subsea completions, and the continued drive to lower costs are driving the requirement for more accurate out-of-straightness surveys. Pipelines are being designed to higher tolerances and are carrying warmer products at higher pressure. It is assumed that pipes will expand and move throughout their lifetime. Surveys are required to confirm that there are no un-planned buckles in the line. This article shows how INS (Inertial Navigation System) and DVL (Doppler Velocity Log) may be combined to meet these requirements. Out-of-straightness surveys are required to confirm that the pipe has moved as expected... (read more)
2012-04-19 04:27:25

Proactive Dredging in the Dutch Wadden Sea

Morphological Monitoring and Forecasting through Development of a Maintenance Management System
The navigation channels in the Dutch Wadden Sea require continuous maintenance due to unceasing sedimentation of sand and mud. This article describes the data management workflow and adopted technologies for a maintenance management system (MMS) used for morphological monitoring and forecasting of the various navigation channels. In 2016, the Dutch Department of Waterways and Public Works awarded a multiannual contract to contractor Gebroeders van der Lee to maintain the navigable waterways and harbours in the Dutch Wadden Sea, where HKV Consultants supports the development, operation and maintenance of this MMS. The challenge of working in these conditions is to find... (read more)
2018-05-22 11:06:18

Magnetometry in Wreck Removal Western Scheldt

The Western Scheldt is being deepened to give larger ships better access to the port of Antwerp. Over fifty wrecks and other obstacles have been removed from the main channel. Magnetometry was one of several surveying techniques deployed to determine the exact position and depth of the wrecks to be removed and as a final check after the wreck removal operation. In order to get the best positioning results an algorithm was developed to invert the magnetometry measurements. The Western Scheldt is the gateway to Antwerp and one of the busiest shipping estuaries in the world. It is essential that... (read more)
2008-01-01 01:00:00

Identification of the ­Wreck of the U.S.C.S.S. ­Robert J. Walker

From 21 to 24 June 2013, a NOAA team from the Office of Coast Survey (OCS) and the Office of National Marine Sanctuaries (ONMS) conducted a joint mission to explore a shipwreck off the coast of New Jersey near Absecon Inlet and Atlantic City. That wreck has proved to be the oldest known wreck of a hydrographic survey ship yet found, Robert J. Walker, a US Coast Survey ship wrecked in 1860 with loss of twenty crewmembers, whose tragic story resonates within NOAA to this day. The NOAA Ship Thomas Jefferson, performing hydrographic surveys off the New Jersey coast in... (read more)
2013-12-04 05:01:20

Europe Can Take Maritime Lead

Ian Shepherd is the EU Ambassador of the Sea.
In this capacity, he is working to improve maritime co-operation within Europe by formulating a maritime policy. Hydrointernationalhas taken the opportunity to interview him, while of course paying attention to the hydrographic perspective on this continent.<P> Please introduce yourself toour readers. Born in Glasgow, I was brought up in a family heavily steeped in shipbuilding and it was little surprise when I decided to go to the Britannia Royal Naval College. I spent 21 years in the Royal Navy, specialising in Underwater Warfare and Navigation and have subsequently worked in the oil and gas industry, shipbuilding as a Trials Master,... (read more)
2008-05-30 12:00:00

MSDI at the Flemish Coastal Division

Developing a Marine Spatial Data Infrastructure in Flanders, Belgium
The Flemish Hydrography, part of the Flemish government in Belgium, is currently setting up and integrating a Marine Spatial Data Infrastructure (MSDI) for the Belgian coast, the canal Ghent-Terneuzen and the River Scheldt. This process will be done in three consecutive phases, of which the first is nearing its testing phase. The newly developed MSDI will harmonise the data between land and sea. Not only within the Flemish government, but worldwide a shift can be seen in the appreciation and implementation of SDIs. Spatial Data Infrastructures tend to prove their use in all sorts of fields, ranging from spatial planning... (read more)
2011-03-16 12:16:00

GIS Applications for Nearshore Investigations

Site investigation surveys involving hydrographic or geotechnical data acquisition often generate high volumes of data and require handling through specialist software packages. The combination of volume of data and variety of software and formats may hinder the analysis and presentation of data. In order to attain a fluent operating system, many companies are choosing to integrate datasets and analyses through the implementation of structured data management solutions such as Geographical Information Systems (GIS). In an industry within which the majority of primary data is spatially referenced, GIS offer the capability to merge datasets based on this fundamental property. However, the... (read more)
2008-01-01 01:00:00
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