Surveying the Coast

Chris Ransome & Associates, Inc. (CRA, Inc.)
Based out of Houston, Texas, USA, CRA is the specialist hydrographic survey company on the Gulf Coast. As a provider of hydrographic surveying solutions, CRA specialises in using the latest automated data acquisition systems and offering other technical marine-based services such as sediment sampling, hazard surveys and underwater inspections. In 1987, a team of five experienced land and offshore surveyors who had spent several years working in the oil industry came together to form a company to provide survey services to the Gulf Coast civil engin­eering sector. Leading the venture was former ex-president of Wimpol, Inc. and Aquanav, Inc., Chris... (read more)
2013-05-22 04:16:58

Considerations for Harbour Access Surveying

Most continents have long histories of utilising their waterways to facilitate trade but, with a few notable exceptions, Africa has not yet taken full advantage of possible riverine trade systems. By Rear admiral Dr Neil Guy (retd), South Africa A riverine outlet to the sea from a landlocked state could provide direct access to the world markets and it could establish new inter-modal transport networks that will combine water, rail and road transport systems, which will significantly reduce the cost of imports and exports from and to these countries and make them more competitive on the domestic, regional and global markets.... (read more)
2016-04-12 12:20:21

Flying, Landing and then… Surveying

Seaplane Bathymetric Platform for Remote Area Operations
Remote, difficult to access: it just depends on the point of view. Often, trying to reach some areas with a classical survey vessel or with an opportunity launch is like banging our heads against a brick wall, but it appears to be quite easy to land there with a seaplane. Here is the premise for the Seaplane Bathymetric Platform Project, which aims to integrate bathymetric survey instruments into an existing seaplane to conduct hydrographic surveys in remote and difficult to access survey areas. Maritime navigation development in Canada’s Northern Waters is highly impacted by the lack of nautical charts meeting... (read more)
2015-07-28 01:51:26

Hydrographic Surveying in Greenland Waters

The Hydrographic Survey (Søopmålingen) which is a part of the Oceanographic division within the Royal Danish Administration of Navigation and Hydrography (RADON), conducts hydrographic surveying in the Danish and Greenland waters. This article will focus on operations in Greenland waters. Hydrographic surveying in Greenland can be dated back to 1605. Until the 19th century existing charts were made from data gathered by civilian as well as navy vessels. At the end of the 19th century the Danish Government started considering how Greenland could be charted in a more systematic way. The Charting of Greenland Waters A scientific expedition was commissioned... (read more)
2008-01-01 01:00:00

Data Integration for Coastal Surveying

Combining Laser Scanner and Bathymetric Sensor
When surveying the coastline, the integration of bathymetric (below sea level) and laser scanning (above sea level) data causes problems due to the different imaging properties. However, by ensuring that the different data sets have been accurately georeferenced and oriented, a complete and accurate model of the terrain above and below sea level can be obtained. This technique was employed to survey the area of Portovenere in Italy, including the San Pietro church located on a steeply sloping rocky promontory, with positional accuracies in the order of 5cm.<P> View Larger Map One of the biggest issues incoastline survey is the... (read more)
2009-06-04 12:00:00

Surveying in the Ross Sea

The deepwater research vessel Tangaroa of the National Institute of Water & Atmospheric Research (NIWA) of New Zealand undertakes regular research expeditions to the Antarctic waters. In the last eight years, this 70m ice-strengthened vessel has successfully completed seven voyages to Antarctica: three of which were to the Ross Sea. This article describes her 48-day voyage in 2006. During this latest voyage, she once again collected data to extend our knowledge of the geophysical and biological make-up of the Ross Sea region Looking Back Tangaroa ’s first voyage to the Ross Sea was in February–March 2001, when it undertook a... (read more)
2007-05-09 12:00:00

Different Approach to Surveying Antarctica

Operation Rock Bottom
Navigation data is poorly available in Antarctica. If navigational data is available it often dates back to the early 1900s with many lead line surveys. An initiative was undertaken by Stephen Wilkins of Xplore Expeditions to collect bathymetry with a multi-beam survey system making use of the sailing vessel Xplore. Together with Yoann Boulaire from SHOM, France and Fernando Landeta, hydrographic technician from Skyring Marine Chile, an IHO qualified survey was performed in Antarctica on an expedition sailing yacht. As all mariners navigating in Antarctica know , one must use a combination of all available means to enable safe travel... (read more)
2013-05-22 04:59:22

Class B Hydrographic Surveying Course

Skilltrade together with STC started a new hydrographic surveying course in Rotterdam (The Netherlands) in line with the requirements as laid down by the IHO (International Hydrographic Office). The partnership resulted in a course schedule for the so called class "B" program, which is defined as: "a programme which provides a practical comprehension of hydrographic surveying for individuals with the skill to carry out the various hydrographic surveying tasks". The idea to develop this course was initiated early 2006 as there is a real shortage of hydrographic surveyors in the industry. On Monday, 22nd Jan 2007, the first hydrographic surveying course started. Nine... (read more)
2007-02-21 12:00:00

Flying, Landing and then… Surveying

Remote, difficult to access: it just depends on the point of view. Often, trying to reach some areas with a classical survey vessel or with an opportunity launch is like banging our heads against a brick wall, but it appears to be quite easy to land there with a seaplane. That is the premise for the Seaplane Bathymetric Platform Project, which aims to integrate bathymetric survey instruments into an existing seaplane to conduct hydrographic surveys in remote and difficult-to-access survey areas. By Mathieu Rondeau, CIDCO, and Olivier Ayotte, Geosphair Aviation, Canada Maritime navigation development in Canada’s Northern Waters is highly impacted... (read more)
2015-07-31 08:45:00
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