New Bathymetric Data Assessment at the UK Hydrographic Office

To support the production and maintenance of navigational charts, the United Kingdom Hydrographic Office (UKHO) receives large quantities of bathymetric data from a great number of sources. This data is all assessed for possible dangers to navigation and, where such dangers exist, promulgated by the Notices to Mariners system. Because of the safety implications, time is of the essence and UKHO uses an in-house developed system to reformat, store and assess the data. Although the system is now getting somewhat dated, has limited functionality and is due for replacement, it has stood the test of time and the principles of... (read more)
2008-01-01 01:00:00

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

Deepwater Survey, Investigation and Intervention

Survey, geotechnics and Remotely Operated underwater Vehicle (ROV) operations are all individually very interesting subjects as far as their exponents are concerned. But this combination, with the added dimension of working at an unusual work-site in extreme depths of water, has made the Prestige Project a very challenging programme for participants. In November 2002, whilst under tow in poor weather conditions, the Bahamas-flagged Prestige oil tanker broke in two and sank approximately 150 miles off the north west coast of Spain and Portugal in 3,800 metres (12,500 feet) of water. The two parts of the hull came to rest on... (read more)
2008-01-01 01:00:00

STEMA Survey Services bv

New techniques to reveal crucial sub-bottom details
After working for eighteen years with the trailer department of a dredging company, Stef Mars started his own hydrographic survey company in 1985. Working on board of hopper trailer suction dredgers and later as hydrographic surveyor with project management he came across two main problems: a lack of reliable sub-bottom information, and the elusiveness of liquid sediment, or silt. Stema is known mostly as a hydrographic and geophysical survey company; it is less known as a manufacturer of software. However, we have developed our own tools that may be of interest to readers. The Company A team of geologists, hydrographers... (read more)
2008-01-01 01:00:00

Mapping the Seafloor with Remote Sensing and Satellite Imagery

An Analysis of the Techniques and Benefits of These Methods
70% of the Earth is covered by water, but so far just 7% of it has been surveyed (Mars, Venus and the Moon are better surveyed). Hydrography as a science has changed dramatically since the first measurements were made by Alexander Dalrymple and James Cook with lead lines and sextants. Singlebeam echosounders were invented in the 1920s – a technology still used today for mapping the seafloor. This method of using echosounders can produce very high-resolution bathymetric data but the high operational costs and the slow working process make it economically unsuitable for covering large areas. However, with the ongoing expenses of... (read more)
2018-06-19 09:23:54

IENCs in Flanders

Inland Electronic Navigational Charts Produced by Flemish Hydrography
Safety of navigation on inland waterways is as important as in maritime waters. To guarantee this, Electronic Navigational Charts (ENCs) have now been produced for several years. As inland waterways have specific features and regulations different from the maritime area, the use of ENCs is not sufficient. International standards have been developed specifically for Inland ENCs, which contain chart information required for safe navigation on inland waterways and in mixed traffic zones. These navigational charts are extremely important as they cover not only the maritime navigation zone, but also the adjacent inland waterways in Flanders which have not been mapped... (read more)
2013-04-02 03:06:00

It’s All About Location, Location, Location

Hydro international Interviews Steve Hagan
The rate of data growth is climbing exponentially, thanks to new sensors, new social networks and new ways to create and capture data. In response, Oracle is tackling four issues on behalf of its customers: supporting big data, simplifying IT, providing deep analytics and enabling implementations either on the cloud or on-premise. Hydro International speaks to Steve Hagan, vice president of development for server technologies at Oracle Corporation about the organisation’s relationships with key geospatial software and data suppliers, its special concentration on very large databases, and its focus on addressing ‘spatial intelligence’ and the mainstreaming of location into business... (read more)
2012-10-05 04:34:51

Wreck Monitoring in Dredging Operations

Multiple survey and positioning techniques for MV <i>Assi Eurolink</i>
The problems posed by the wrecked vessel Assi Eurolink called for unique solutions that have set a new benchmark in the way that similar wrecks are made safe. On 25th January 2003 a collision occurred between the Swedish vessel Seawheel Rhine and a Dutch freighter, the Assi Eurolink. The collision was within the shipping lane ‘Friesland Junction’, about 77 kilometres (48 miles) off the coast of the Dutch island of Terschelling. The Swedish ship Seawheel Rhine sustained visual damage to her bow above water line, but the ship was able to continue to Hamburg. However, the Assi Eurolink sank almost... (read more)
2008-01-01 01:00:00

Multi-purpose ENCs for Ports

How to Create and Maintain Them
Ports require access to a wide range of data and information to function safely and efficiently. Some of that data is acquired from external stakeholders but most is generated internally within the port. It is very often managed and held within a single software application, department or business function. Streamlining how a port manages its data, by adopting a more data-centric approach, can bring major benefits. OceanWise has been working with ports for over five years and has pioneered the concept of a port, when considered more widely, as being a maritime information infrastructure. The Maritime Infrastructure There is nothing... (read more)
2017-02-13 03:38:08

Ocean Business 2011 Preview

The third edition of Ocean Business will take place in Southampton, UK, from 5 – 7 April. The organisation anticipates more than 4000 visitors at the event, with 309 exhibitors from 19 countries. Ocean Business 2011 will be bigger than the previous editions, but will retain the cosy element, with exhibitors all taking relatively small stands. This time the organisation will have more vessels coming in, and there will be a full training and demonstration programme again. The organisation also found new locations for the offsite social events and the gala dinner venue is twice as big as last time.... (read more)
2011-03-16 04:15:56
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