Deep-water Black-box Retrieval

A Game of Hunt-the-pinger Against the Clock
Restricted operating life, limited range and bearing ambiguity in deep water are the known limitations of current locator beacons mounted on aircraft. These problems raise important questions: what is the best method of locating existing pingers and what can replace them? In deep water, pinger detection equipment could be installed on a submarine. Alternatively, a transponder beacon can provide both range and bearing information, as well as demonstrate a significantly longer listening life. Although heavier and therefore not suitable for light aircraft, commercial aircraft could easily accommodate such beacons allowing easier retrieval of the aircraft black boxes. In the July/August... (read more)
2009-12-04 03:49:14

Government and Private Surveying Working Together

Hydro International Interviews Captain Nuhu Jidere Bala, Hydrographer of the Nigerian Navy
Nigeria is a country that plays an important role for the African continent, even though this is not at all times apparent. It has quite a lot of offshore activity and its ports handled 22,324,223 million metric tonnes of cargo in the first nine months of 2014. Improving the waterways is one of the goals the management has set itself. Add to this all the inland waterways that have an economic significance as well. This makes it interesting to talk to Captain Nuhu Jidere Bala, Hydrographer of Nigeria. Nigeria has almost one thousand kilometres of coastline and eight thousand kilometres... (read more)
2015-04-03 01:41:51

Forward Looking Sonar for Navigation

Safer Navigation with Wider Adoption of FLS
An increasing number of ships are venturing into areas where the only hydrographic data available do not meet the standard many of these vessels require for safe navigation. A number of recent and some not so recent marine casualties have resulted from encounters with uncharted, isolated seabed features (Russell, 2014). The situation is recognised by the IHO; but the necessary improvement to the hydrographic data will take years. Meanwhile, the informed use of Forward Looking Sonar (FLS) could contribute to safer navigation in inadequately charted areas. Present-day commercial FLS developed from its use by fishing vessels and for obstacle avoidance... (read more)
2015-04-03 02:14:06

Shallow Inland Water Bathymetry Meets IHO S-44 Special Order

Application of the Kongsberg GeoSwath System
For many years, the GeoSwath system from Kongsberg GeoAcoustics has been providing an efficient simultaneous swath bathymetry and sidescan seabed mapping solution with accuracies that meet the IHO S-44 Special Order standard for hydrographic surveys. GeoSwath systems have been fitted to a number of small crafts and have been utilised to conduct bathymetric surveys of lakes, ponds, dams and rivers. This article describes two of the vessels that have been employed to undertake this area of work. The use of Unmanned Surface Vessel (USVs) allows surveying in locations and situations in which deployment of conventional platforms is not practical or... (read more)
2018-02-27 01:01:18

Market Prospects for AUVs

This article is based on the results of a new studyThe AUV Gamechanger Report 2008-2017published by Douglas-Westwood Ltd. This report aims to consider the prospects for this game-changing technology and value the future markets for AUV manufacturers to 2017.<P> Un-tethered Autonomous Under­water Vehicles (AUVs) have the potential to change the game in many areas of underwater oper­ations. Long an area of research, AUVs are beginning to show their abilities as cost-effect­ive tools in applications ranging from deep-water survey for the offshore oil and gas industry to military oper­ations. The growing need for many facets of ocean observation also offers great... (read more)
2007-10-27 12:00:00

Mariners Need More Current Hydrographic Data

Hydro International Interviews Rear Admiral Christian Andreasen, NOAA (Ret.)
Almost 50 years in hydrography gives you insight and authority to talk about the field and the changes it has gone through in half a century. Rear Admiral Christian Andreasen talks about his career. He is certainly not somebody who only looks back, but is still looking into the future, sharing strong ideas about where hydrography will need to go: ‘Mariners do not understand why hydrographic offices are not more supportive. Finding ways of providing mariners with more current data is an issue.’ Since the 1960s, when you became a hydrographer up to the present, the means and techniques for... (read more)
2012-06-06 03:35:09

“Hydrographically Developed Countries Should Reach Out to Developing Countries”

Hydro International Interviews Commodore Min Thein Tint, Commanding Officer of Myanmar Naval Hydrographic Centre, Myanmar Navy
Oriental countries are dedicated to the hydrographic profession but don’t often beat the drums in order to be heard. There’s a lot of work being done, though. One example is Myanmar, a country with several hundreds of kilometres of coastline and many islands as well as inland navigable waters. 'Hydro International' interviewed Commodore Min Thein Tint, Commanding Officer of Myanmar Naval Hydrographic Centre, Myanmar Navy, on capacity building, offshore and inland navigation, data policy and cooperation with the business. How is the MNHC improving its capabilities? Although MNHC became a member of IHO in 2004, the office was founded in 1955... (read more)
2017-01-18 09:25:14

2D/3D Web-mapping

Web Visualisation Coastal Orthophotos
This paper describes the development of a web spatial image server used for sharing huge sets of georeferenced coastal orthophotos on the web via an easy visualisation interface. Traditional cartography was considered a highly sophisticated methodology for the production of high-quality maps, using the sales-business model of the non-internet economy and dedicated to specialists. The recent arrival on the scene of three internet leaders whose general mission is to map everything, and the release of their popular online earth browsers has had a huge impact in the geomatics arena. All are by now familiar with the success enjoyed by Google... (read more)
2007-03-02 12:00:00

Self-installing Wind Turbines

A Different Approach
The Dutch company SPT developed a new foundation concept for offshore wind turbines in order to reduce the costs and environmental impact: a Self Installing Wind Turbine. The concept is based on a tripod with suction piles. As these foundations do not penetrate as deep as single pile structures, a different approach for survey and soil investigation techniques can be applied. Prior to the design of a wind farm, information on the seabed properties, its behaviour and the underlying geology are required. Insight into the morphology of the seabed by multi-beam (Figure 1), and side-scan sonar surveys (Figure 2) can... (read more)
2012-10-05 04:41:29

Looking Far beyond the Horizon

Hydro International Interviews Steven Xu, CEO, Hi-Target
These are exciting times in the geomatics and hydrographic industry. Innovative solutions are being developed, integration is the main keyword and the big players are acquiring smaller companies that add a new dimension to their portfolio. Europe, Japan and North America are traditional strongholds of geomatics, but several very ambitious companies from China are doing their utmost to catch up with the frontrunners. Steven Xu, CEO of Hi-Target, was more than happy to share his thoughts and expectations with Hydro International. Read the interview here. Wim van Wegen and Joost Boers, Geomares Publishing, The Netherlands Hi-Target was established in Guangzhou,... (read more)
2016-02-01 04:20:25
Search Filter