An Adaptable Survey ­Platform for Shallow Water

Bathymetric Charting of Nearshore, Harbour, Estuary and River Settings
High-resolution bathymetry and water quality surveys of shallow shelf and inland water bodies are an increasingly necessary part of environmental management with climate change pressures. This paper describes a new method for data acquisition using a small, stable, adaptable, single-operator survey platform. Development and natural (climate related) changes are placing an ever increasing pressure on our coasts, shallow marine shelves, estuaries, rivers, harbours and inland water bodies. In Europe these pressures have been recognised and attempts made to address the impacts under legislation such as the Water Framework Directive, which seeks to classify all water bodies by their health and... (read more)
2013-01-18 01:45:32

Reservist Hydrographers in Mobile Survey Team

The Royal Australian Navy’s Australian Hydrographic Service has recently added to its survey capability with the innovative use of reservist hydrographic surveyors in a mobile survey team. Earlier this year, the new team undertook a proving survey on Great Keppel Island that tested the operational concept. Hydrointernationalreports on this new initiative. ------------------------------------- "Happily, it is a profession of volunteers... to them, the interest is constantly kept up... the accuracy of the work of each assistant, when proved, is an infinite gratification to him, and he has also the continual satisfaction of feeling that, of all he does, a permanent record... (read more)
2007-10-27 12:00:00

Mapping the Deep Ocean with Multiple AUVs

Ocean Infinity’s Seabed Exploration Project
Ocean Infinity’s seabed mapping campaign commenced in the summer of 2017. The Ocean Infinity team is made up of individuals from multiple disciplines, who have gained vast experience with deep-sea exploration operations in the past. Their combined knowledge and insight led to the idea to undertake deep-sea mapping operations using up to eight autonomous underwater vehicles (AUVs), paired with eight unmanned surface vessels (USVs). This novel concept is explained in more detail in this article. Human inquisition drives us to explore. This has led man to delve below the surface of the oceans. Our ability to understand the undersea world... (read more)
2018-04-24 09:22:31

Hydro 2003

Interview with Maurice Perwick, Chairman of the Organising Committee, New Zealand
Although not fitting into the traditional biennial series of well-known HYDRO Conferences and Exhibitions, the year 2003 will nevertheless see a 'Hydro 2003' Hydrographic Conference and Exhibition. This time it is the New Zealand region of the Australasian Hydrographic Society which will organise the event in Christchurch, New Zealand from 24th Ð 26th November 2003, the fourth in the series of Australasian Hydro Symposia. Does the ‘down under’ region deserve more attention from the International Hydrographic Community? The Chairman of the organising committee of Hydro 2003, Maurice Perwick, agreed to be interviewed by Hydro international and provide more information on... (read more)
2008-01-01 01:00:00

A New Solution for Subsea Metrology

Combination of Acoustics and Photogrammetry
Invariably, metrology is required at the critical stages of field development and the main goal for improvement is to reduce the time taken for acquiring data. The technique discussed offers significant improvements in terms of time and required equipment. Offshore Construction During offshore construction several structures have to be interconnected by means of spools or jumpers. In order to determine the dimensions and relative attitudes of the connections, surveyors deploy ROV-mounted instrumentation. IMCA S019 Guidance on Subsea Metrology offers the following combined accuracy guideline: 50mm to 150mm in X,Y and Z axis 0.5° to 1° for relative pitch, roll and heading.... (read more)
2014-09-02 11:57:09

Dredge Efficiency and Precise Positioning

Integrating Dredging and Hydrographic Techniques
Dredgers involved in mining for (precious) minerals and metals often work in an inland dredging pit. Dredgers float in a ‘wet environment’ where the surrounding water is used as transport medium. The fact that the minerals are mostly covered in various sediments is one of the biggest problems in mining them. This article describes some of the techniques used in these dredging operations and illustrates the importance of integrating techniques and information. Most minerals, like rutile and zirconia, are to be found on top of a layer of clay with the highest concentrations found closest to it. Pewter is mostly... (read more)
2008-01-01 01:00:00

Metocean Automatic Monitoring Stations in Malaysian Waters

Marine meteorological and oceanographic (metocean) data is required at all levels (e.g. planning and operations) of the Meteorological Department, the Naval Department, Ports or Harbours and the Oil and Gas Industry. The Meteorological Department of Malaysia has recently embarked on a Coastal and Port Automatic Meteorological and Oceanographic station network to support weather forecasting. This paper details functions and requirements for the development of this system. Marine meteorological and oceanographic technology has advanced a long way since the early days, from recording measurements on paper chart rolls to using solid-state memory, from simple wave staffs to satellite-transmitting wave directional buoys,... (read more)
2008-01-01 01:00:00

Trends and New Technology in the ROV Industry

New IMCA ROV Classifications and Applications Moving Towards Renewables
Over the past few years, the requirement for ROV support in the oil & gas sector has been hampered by the downturn in the sector. However, the continued investment in renewable energy has provided opportunities for manufacturers to continue their R&D projects to create the next generation of ROV systems. In view of this, the IMCA guidelines for the Safe and Efficient Operation of Remotely Operated Vehicles (IMCA R 004 Rev4) has been updated. The guidelines now include an expanded list of ROV classifications based upon the increased diversification of tasks performed by ROV systems around the globe. The revised... (read more)
2017-08-07 01:31:12

Low Cost or Cost Effective?

Managing cost through the fit for purpose principle
When asked to do an article on low cost hydrography within the offshore construction industry the first word that sprang to mind was 'cheap'. However 'cheap' might not be 'cost effective' which is, or at least is supposed to be, the decision driver. For a private Company to remain in business it is essential that any external service hired, provides value for money. Hence all survey services within the private sector can be considered 'lowest cost'. There is however another critical factor that shall be considered. If a service impacts on installation spread efficiency, it might be worthwhile to spend... (read more)
2008-01-01 01:00:00

Oceanology International to have Three Points of Focus

When Oi08 opens at the ExCeL centre in London’s Docklands on 11 March, the exhibition and its accompanying conference will focus on the three important issues that have begun to dominate thinking in ocean science and technology: climate change, meeting future energy demands, and ensuring environmental and civil security. These have become interconnected issues, with expertise now moving freely between each of these apparently specialised sectors.<P> With a 3-day conference accompan­ying this major exhibition, it is almost inevitable that public concerns about climate change will attract considerable interest. The role of the oceans in global warming is likely to take... (read more)
2008-03-12 12:00:00
Search Filter