Invited Reply

Hydrography or Hydrogeomatics?
In common with all sciences, hydrography too is undergoing rapid change with regard to data acquisition and processing, instrumentation, application and many other aspects. Differing ideas may be found within the hydrographic community concerning these developments, which direction to take, change in the nature of the science, etc. and some opinions are to some extent controversial. Hydro international would like to draw attention to such diverse opinions when and in whatever context they arise by modifying her traditional interview in this issue by a column entitled ‘Invited Reply’. The pertinent question will here be answered by six prominent figures from... (read more)
2008-01-01 01:00:00

Computer-aided Paper Chart Production in Japan

‘Was all of this produced with the computer system?’
The Japan Hydrographic Department began developing a computer-aided production process about twenty years ago, but this proved difficult due to limitations in computer technology. Subsequent progress in this area has helped development of a computer-aided chart compilation method, resulting in unimagined improvements in efficiency. This article describes events of the past twenty years. Because of their indispensability for maritime navigation it is important that navigational charts be produced within as short a time period as possible and that their contents be constantly updated with the latest information. Despite this, the fact of most chart production processes being carried out by... (read more)
2008-01-01 01:00:00

As it Was

by an Old Hydrographer
In 1953 there appeared, amid a welter of underwater explosions, around the northern end of Das Island in the Persian Gulf a converted WWII surplus LCI(L) looking like some form of marine tram and still complete with fittings for personnel gangways on either side of the bow. Das Island was then an uninhabited, waterless, rocky piece of volcanic detritus, useful only as a shelter from the north-west Shamal wind. As a crew-member of a naval hydrographic survey ship working in the area I thus caught my first glimpse of the new marine seismic survey industry at work. Twelve years later... (read more)
2008-01-01 01:00:00

Locating Cagayan Sulu

The Last Taut-Wire Sun-Azimuth Traverse
A glance at a map of the Philippine Islands shows that the Sulu Sea is nearly an enclosed body of water: the Sulu Archipelago on the southeast; Palawan to the northwest; the main body of the Philippine Islands to the northeast; and Borneo on the southwest. Far in the southern reaches of the Sulu Sea, located almost midway between the Sulu Archipelago and Palawan and northeast of Borneo, are a small group of islands, the largest of which was known as Cagayan Sulu, today called Mapun. These small islands were among the most remote of the Philippine Islands and determining... (read more)
2013-01-18 02:55:35

Successful Delivery of Coastal Survey Data to the Royal Australian Navy

IHO Order 1b Bathymetric Lidar Data
Amongst the largest contracted coastal hydrographic Lidar survey projects awarded in recent years is the Australian Hydrographic Service (AHS) survey of the Torres Strait in Northern Queensland. The intent of this very large survey was to update nautical charting in the region, facilitate safer navigation and enhance the capacity of maritime enforcement vessels to protect and secure Australian waters from incursions by illegal foreign fishing vessels. As it was to be used for international chart products, the survey data had to be of an accordingly high standard. Approximately 850km north from Cairns, the Torres Strait forms the confluence between the... (read more)
2010-05-31 10:44:08

Underwater Wireless Video Communication

New Horizon of Underwater Explorations
This article presents the development, production and testing of wireless underwater acoustic video communications, which is unique in the world today. It also discusses the implementation of this technique on Autonomous Underwater Vehicles (AUV’s) to perform inspections of underwater oil and gas pipelines. The achieved characteristics, limitations and upcoming prospects are presented. Currently, there are about 1000 Remotely Operated Vehicles (ROVs) and up to 700 AUVs in the world, according to Douglas-Westwood. In the coming 4 to 5 years it is expected that this fleet can be increased by 50-60% and may be even more than doubled. The vast majority... (read more)
2016-09-27 04:18:23

A Company with a Deeper Understanding

Hydro International Interviews John Ramsden, Managing Director of Sonardyne International Ltd
Sonardyne is an organisastion at the forefront of acoustic, inertial, sonar and optical subsea technology development. It takes vision, a sustained focus on research and development and strong leadership to get there. Hydro International interviews John Ramsden, managing director of Sonardyne, for an in-depth look at adapting to the diverse nature of subsea operations and where the company that is now 43 years young, is headed next. You have now served as MD for five years and been with the organisation for a total of 20 years, achieving growth in all of Sonardyne’s business divisions. What drives you? Being part... (read more)
2015-04-03 02:10:51

Coastal Monitoring of Water Quality

Autonomous Surveying of Shallow Coastal Waters for Clean Seas and Shorelines
The wave-propelled AutoNaut unmanned surface vessel (USV) completed a short trial off the south-west coast of England to monitor the water quality by a sewage outfall. AutoNaut demonstrated its ability to reliably operate in shallow waters whilst also recording and transmitting data. A suite of sensors aboard the USV worked in conjunction with satellite data from synthetic aperture radar (SAR). Analysis indicated that the seawater close to the outflow was not negatively affected. The combination of technologies is pioneering for the application and the trial highlights the potential of this innovative approach to conduct long-term marine monitoring – including the... (read more)
2017-08-02 11:23:28

3D Web-Mapping

Integrating Marine Data into NASA World Wind
While Google Earth is the best known 3D web-mapping viewer currently in the public domain, there are alternative virtual globe viewers available. In particular, this article focuses on the NASA World Wind viewer, using OGC data-dissemination standards and multi-beam sonar data from the Irish National Seabed Survey to illustrate its potential. The creation of a range of innovative GIS tools and systems is enabling the harmonisation and electronic sharing of geospatial data and services across distributed networks. 3D web mapping viewers, such as NASA World Wind, are perhaps some of the most visible of these products. OGC Standards Such developments... (read more)
2008-01-01 01:00:00

Managing UXO Risk in Offshore and Renewables Projects

The Need for a Survey Strategy
With the increase of offshore marine projects over the decades, demand for a cost-effective and efficient risk-based approach for the mitigation of UXO (Unexploded Ordnance) has become a priority for offshore construction teams. From the numerous projects for the offshore renewables and major gas distribution projects in North West Europe it was learned that offshore UXO mitigation is mostly a survey issue, as the survey industry can provide the tools to locate, identify and manage potential UXO. This article suggests a best practice strategy coming from experience gained with offshore marine project management and modern survey methods. In the more... (read more)
2015-08-27 02:04:24
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