1997-2007: A Decade of Developments in Hydrography

We all know what is the oldest profession in the world. The second oldest is probably that of land surveyor: Adam undoubtedly wanted to stake out the boundaries of paradise in order to know what was and was not his. Paradise, or the Garden of Eden, was to be found in the land of the Euphrates and Tigris, where these two rivers converge at the town of Qurna in the present Shatt al Arab. And apart from his topographical activities Adam must also have made some hydrographic observations, probably just using a stick cut from a local fruit tree! After... (read more)
2007-02-02 12:00:00

Horses, Hydrographers and Hypsography

US Coast and Geodetic Survey
Administrative officers, long experienced in studying estimates of the various field parties engaged in hydrographic work, were somewhat surprised to see an estimate submitted by the commanding officer of the USC&GS Ship Discoverer preparatory to the 1937 season’s work in the Aleutian Islands, Alaska, for items such as: 1 Riveter, tubular; 4 cinches, pack saddle type; 4 cinches for riding saddles; 2 cowbells, small size; 4 saddle blankets; 1horseshoe hammer; and 2 pack saddles; and other related items. The following, describing the use of horses on Unimak Island during the summer of 1937, will make it clear why estimates for... (read more)
2012-11-20 04:41:36

Precise RTK GPS Water Levels

Incline plane models in geoid-ellipsoid separation calibration
As more people adopt RTK GPS technology for measuring water levels, the issue of ellipsoid-geoid separation is increasingly being discussed. This article outlines various projects undertaken to calibrate this separation, and presents information to consider when using RTK GPS for measuring relative to an orthometric (geoid) datum. RTK GPS is increasingly being used for measuring water-level corrections during hydrographic survey, as for water levels in general. Measuring this third vertical dimension usually requires local site calibration to correct for separation between WGS84 ellipsoidal height and geoidal elevation, enabling conversion of WGS84 heights to orthometric heights such as mean seal level... (read more)
2008-01-01 01:00:00

James Horsburgh

In the 18th century, a trading ship was on a passage in the Bay of Bengal. There were 250 people on board the sailing ship. The sea through which they traversed was mostly uncharted. The ship unfortunately strayed many miles from her path and was wrecked on a remote islet in the middle of the Indian Ocean. The story might have ended there, but for one of the survivors James Horsburgh it had just begun. He resolved to dedicate his life ‘making accurate charts’. It was a promise which he kept for the next fifty years. He did not seek... (read more)
2008-08-27 12:00:00

Underwater Communications and the Level of Autonomy of AUVs

A Tale of Two Technologies
Autonomous underwater vehicles (AUVs) are a recurrent theme in maritime and offshore applications, and in particular those involving long and costly data-gathering operations such as hydrographic surveys. Challenging surveys like those required for search operations following an aircraft crash in the oceans and for mapping oil spills below the ice during Arctic operations demonstrate the need for flexible solutions that enable mapping in deep, remote and congested locations. AUVs provide flexibility by cutting the umbilical cord to the mother vessel. This implies the necessity for underwater communications and a high level of autonomy for the vehicle as well as interoperability... (read more)
2015-08-06 03:10:32

By the Old Hydrographer

A number of largely British settlements had been established in New Zealand by the early 1840s,where natural harbours had been found. The general Admiralty chart of New Zealand, published in 1836 and resulting chiefly from Captain Cook's surveys became inadequate for the navigation of inshore waters by vessels supporting the growing communities. To remedy this situation, the Hydrographer of the Navy Admiral Beaufort, selected HMS Acheron, a barque-rigged paddle wheel steamship of 700 tons, to be fitted out for hydrographic work. To command her he chose Captain Lort Stokes, hydrographer of long experience. The ship sailed from Plymouth, England, for... (read more)
2008-01-01 01:00:00

This is NOAA’s Plan for Deep Ocean Mapping of US Waters

Identifying and Filling Gaps in Bathymetric Coverage Deeper Than 200m
NOAA is using a systematic approach to map all US waters in support of Seabed 2030 objectives and to contribute to the complete mapping of the world’s oceans in the next ten years. Mapping within US waters is a national goal that will only be accomplished through strong coordination and partnerships with other federal agencies, academia and the private sector. The Nippon Foundation - General Bathymetric Chart of the Oceans (GEBCO) Seabed 2030 project has revitalized international and national interest in ocean floor mapping (Smith, 2018). Across US oceans, coasts, and Great Lakes waters, the National Oceanic and Atmospheric Administration... (read more)
2020-06-02 08:59:56

Survey Vessel Acadia

By an Old Hydrographer
On July 5th 2003 the Maritime Museum of the Atlantic, the Canadian Hydrographic Service and former officers, staff and crew of the CSS Acadia, gathered in Halifax, Nova Scotia, to celebrate her 90th birthday. The Acadia was the pride of the Canadian Hydrographic Service fleet for many decades. Now, as the museum’s largest artefact, she draws considerable attention, respect and admiration from those who appreciate fine vessels. The Canadian Survey Ship (CSS) Acadia was designed and built for hydrographic surveys by Swan, Hunter and Wigham Richardson Ltd. at Newcastle-upon-Tyne, England. She arrived in Halifax, Nova Scotia, on July 8th 1913... (read more)
2008-01-01 01:00:00

International Communications and Navigation Ltd

International Communications and Navigation Ltd (ICAN) is a product development and systems integration company incorporated in 1996. The company has its headquarters in St John’s, Canada with offices in Quebec City, Canada and Dallas in the US. ICAN was initially conceived as a systems integration company that focused on differential GPS infrastructure. This changed in 1997 as ICAN became involved in shipboard projects and started developing electronic charting technology. The company focused from the beginning on delivering systems that provided utility to the customer. Navigation is an essential utility provided by electronic charting systems, but there are many other aspects... (read more)
2008-01-01 01:00:00

Securing Offshore Oil and Gas Infrastructure with USVs

Employing commercial-off-the-shelf USVs that can be rapidly reconfigured with a diverse range of sensors can enhance the ability to deliver energy to America and the world. This is a win-win for the energy industry, says George Caldorisi when he describes the securing of oil and gas infrastructure with Unmanned Surface Vehicles. While the exigencies of climate change have led to major strides in the development and deployment of renewable energy sources such as solar, wind and others, the world’s energy needs will continue to be met primarily by oil and natural gas for the foreseeable future. As readers of Hydro International are well aware, the strategic implications of the United States’ transition from energy dependence to energy independence to becoming a net oil and gas exporter are being felt worldwide. While some saw this sea change coming, most did not, and the community of nations is still coming to grips with... (read more)
2020-04-06 09:50:21
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