Exploring the Deepest Points on Planet Earth

Report on The Five Deeps Expedition
As extreme explorer Victor Vescovo continues his round-the-world expedition to become the first person to descend to the five deepest points in the Earth’s five oceans using the custom-built deep submergence vehicle Limiting Factor, it prompts the question: ‘Do we know as much about the deepest places on our planet as we thought?’ As extreme explorer Victor Vescovo continues his round-the-world expedition to become the first person to descend to the five deepest points in the Earth’s five oceans using the custom-built deep submergence vehicle Limiting Factor, it prompts the question: ‘Do we know as much about the deepest places on our planet as we thought?’ Today, the best global maps of the oceans have a resolution of 30 arc-second grid cells (926m at the equator). Approximately 82% of the grid cells do not include a single depth measurement (Weatherall et al., 2015), and the percentage of the seafloor that has been directly... (read more)
2019-06-18 03:32:12

Navigate Hydrographic – the Nautical SmartChart

What is the core role of a hydrographer? To map the seafloor? Provide a precise position on the water? Some may believe it is to play with lots of expensive toys on boats, while colleagues are stuck in the office. While all those answers may be correct, I am asking about the core role of a hydrographer. I would suggest that it is collecting data to provide information that companies, clients and consultants rely on to make educated and accurate decisions. This is where our value as a professional service is demonstrated. However, here is another question - how do we present that information and, more to the point, could it be better? What is the core role of a hydrographer? To map the seafloor? Provide a precise position on the water? Some may believe it is to play with lots of expensive toys on boats, while colleagues are stuck in the office. While all those answers may be correct, I am asking about the core role of a hydrographer. I would suggest that it is collecting data to provide information that companies, clients and consultants rely on to make educated and accurate decisions. This is where our value as a professional service is demonstrated. However, here is another question - how do... (read more)
2019-12-19 11:20:59

Hydrography in Japan

Interview with D.Sc. Shoichi Oshima of the Japan Hydrographic Association
In spite of modern communications and connections by air, Japan still is for most people from Europe and America, a ‘far away country’. Hydro international is in the fortunate position to have very good contacts in Japan via dr. Shoichi Oshima, who served as Editorial Advisory Board (EAB) member since the start of Hydro international. The term of an EAB member is officially limited to two years and therefore dr. Shoichi Oshima is now leaving the EAB. On the occasion of his withdrawal he agreed to be interviewed and inform readers on some more details of hydrography in Japan. Can... (read more)
2008-01-01 01:00:00

Hydrographic Data Science

The Art and Craft of Making Useful Hydrography
We are seeing the introduction and application of automated technologies everywhere that supplant the common and accepted ways of doing jobs, writes Paul Cooper. Indeed, the pages of Hydro International are often dominated by examples of such applications, and most of us can think of concrete situations or comparisons between ‘then and now’. Modernisation and new thinking are dramatically changing the way hydrography is collected, processed and made available to users. As the focus is shifting from data collection to data analysis, hydrographic data scientists are becoming increasingly important. When I reported on board at the Naval Oceanographic Office in 1971, we had just... (read more)
2018-01-09 08:44:12

Discovering the True Nature of the Mid-Atlantic Ridge: Part I

Prior to the mid-19th century, the floor of the world ocean was virtually a clean slate. Nothing was known of the bottom of the deep sea with the exception of a few sporadic soundings. In the early 1850s, this began to change as Matthew Fontaine Maury obtained use of one small ship, the USS Dolphin, and sent it out on two expeditions, one in 1852 under Lieutenant Samuel Philips Lee and the second in 1853 under Lieutenant Otway Berryman. Apparently one sounding of 1,720 fathoms was by Lee southwest of the Azores Islands, but under Berryman a number of relatively... (read more)
2014-09-02 11:50:26

Satellite Derived Bathymetry Migration

From Laboratories to Chart Production Routine
Much has been said about Satellite Derived Bathymetry (SDB), but with the exception of SHOM, which led to the introduction of a number of SDB charts into the French chart series, next to nothing has been implemented within the international hydrographic community. This article aims to update readers as SDB, thanks to new generation satellites and modelling, seeing the light after going through a thirty years’ tunnel. In 2014, detailed tests and analysis conducted by government hydrographers, cartographers and recognised satellite scientists operating for a number of projects initiated by the European Space Agency, the WWF and other stakeholders, were completed,... (read more)
2015-10-12 04:09:41

A Flooded Landscape Revealed

3D Hydrodynamic Model Developed for Sustainable Water Abstraction
During the last week of a hydrographic survey of Lough Derg, Ireland’s third largest lake, the remnants of a preserved flooded landscape were unveiled beneath the surface with each passing swath. In early 2015, Geomara was commissioned by the utility company, Irish Water, to undertake a bathymetry and side-scan sonar survey of Lough Derg as part of the planning and design process for the Water Supply Project, Eastern and Midlands Region. This project aims to find a new water source to supply the future needs of the Midlands and Greater Dublin Area.  Over the course of a typically wet and... (read more)
2016-04-04 10:00:41

The Drifters

“Although the Currents of the Ocean form a most important part of hydrography, yet it is only since the introduction of chronometers, and of celestial observations for the longitude at sea, (that is, not much more than forty years ago,) that a competent idea of their [currents] direction and force, in any kind of detail, could be obtained.” Thus wrote Major James Rennell in 1820 in the opening lines of his posthumously published (1832) An Investigation of the Currents of the Atlantic Ocean. Although the existence of oceanic currents had been known since the time of Columbus, the inability of... (read more)
2014-05-19 02:21:58

Lines in the Sea

Maritime Boundary Delimitation
Under the 1982 United Nations Convention on the Law of the Sea (UNCLOS) coastal states may claim rights over the resources of the sea and seabed up to 200 nautical miles (M) from their coasts, and seabed jurisdiction out to 350M where the continental margin is wider than 200M. But many boundaries are ill defined and even disputed. With the oil and gas industry operating in ever-deeper waters, the need for geodetically precise maritime boundaries has become increasingly pressing. This article explores the challenges involved. More than 30% of the world’s oceans now fall under state jurisdiction, with overlapping maritime... (read more)
2007-04-04 12:00:00

An Introduction to EGS

From modest beginnings with just a handful of employees in Hong Kong and the United Kingdom twenty-eight years ago, the EGS Group has now grown into an international group of companies with well over two hundred permanent staff. EGS provides global, specialist multidisciplinary services and products to the civil engineering, construction, telecommunications, power, maritime, hydrocarbon and mining industries. The group head office, EGS (Asia) Ltd, is based in Hong Kong. EGS International is located in the United Kingdom and services the western hemisphere, including Africa and the Middle East. Regional offices are located throughout South East Asia, including Singapore, Malaysia,... (read more)
2008-01-01 01:00:00
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