Underwater Noise Monitoring in the North Sea

Jomopans Project to Monitor Continuous Sound
Sound is of vital importance for marine animals. Eleven institutes from the countries bordering the North Sea have joined forces in the Jomopans project to implement a novel monitoring strategy for underwater sound. Due to the growth of human activities in the sea, sound pollution is a growing concern for marine environmental managers. High levels of anthropogenic noise disturb animals, but the integrated impact of noise on the marine ecosystem is largely unknown. In the Joint Monitoring Programme of Ambient Noise in the North Sea (Jomopans) project, measurements at sea are combined with noise maps from numerical modeling to assess the quantitative levels of sound at sea. Sound is of vital importance for marine animals. Eleven institutes from the countries bordering the North Sea have joined forces in the Jomopans project to implement a novel monitoring strategy for underwater sound. Due to the growth of human activities in the sea, sound pollution is a growing concern for marine environmental managers. High levels of anthropogenic noise disturb animals, but the integrated impact of noise on the marine ecosystem is largely unknown. In the Joint Monitoring Programme of Ambient Noise in the North Sea (Jomopans) project, measurements at sea are combined with noise maps from numerical modeling to assess... (read more)
2019-06-18 04:01:43

Enhancing Port and Harbour Security with Unmanned Surface Vehicles

As readers of Hydro International know, the world’s ports and harbours are crucial to global trade. From Singapore to Antwerp, to Shanghai, to Rotterdam, to Los Angeles to other mega-ports and hundreds of other smaller ports, these crucial nodes are critical to world trade. A disaster like a fire, explosion, or a major oil spill could close one of these ports for an indefinite time. The secondary effects of such a catastrophe could include releasing a huge amount of pollution into rivers and oceans. As readers of Hydro International know, the world’s ports and harbours are crucial to global trade. From Singapore to Antwerp, and from Shanghai to Rotterdam, Los Angeles, other mega-ports and hundreds of other smaller ports, these crucial nodes are critical to world trade. A disaster like a fire, explosion or major oil spill could close one of these ports for an indefinite time. The secondary effects of such a catastrophe could include releasing a huge amount of pollution into rivers and oceans. The magnitude of providing comprehensive security for an average size port – let alone some of the world’s... (read more)
2020-04-17 09:56:56

A New Era for the IFHS?

Hydro international interviews Paul Hornsby, chairman of IFHS
In July last year Paul Hornsby, President of the Australasian Hydrographic Society (AHS), became Chairman of Council of The Hydrographic Society (THS). On 2 November last year, during HYDRO 4, the representatives of five National Hydrographic Societies signed a resolution with which the Memorandum and Articles of Association of the new Federation were endorsed. By doing so THS ceased to exist and IFHS came into force. Will the ambitious new chairman develop a new course for IFHS? Paul Hornsby agreed to be interviewed on his plans. At HYDRO 4 you stated, that you are a customer rather than a hydrographer.... (read more)
2008-01-01 01:00:00

Challenging GNSS Vulnerability?

Or better not?
The reasons for GPS vulnerability due to interference are explained and reasons behind the system being designed as it is today discussed. In addition, consideration is given to why some new developments in future satellite signal structures must meet certain constraints due to United States and NATO national security issues. The impact of GPS on all maritime operations is immense; one would hardly know what to do were it ever to fail in what it generally does. But unlike in many fairy tales, real life may be a little harsher than ideal; a simple little box may deny our access... (read more)
2008-01-01 01:00:00

Global Navigation Satellite Systems

Infrastructure Status and Developments
The concept of GNSS was first introduced by the European Space Agency (ESA), the European Commission (EC) and Eurocontrol in the early nineties. They defined requirements for a European GPS augmentation system, GNSS-1, and a full European satellite navigation system, GNSS-2, later together renamed EGNOS (European Geostationary Navigation Overlay System) and Galileo. Satellite navigation infrastructure status and developments are described here. Nowadays the term GNSS is used for the system of systems comprising GPS and GLONASS, with the later addition of Galileo. Satellite-based and ground-based augmentation systems (SBAS and GBAS) were introduced to augment GPS and GLONASS. Hydrographers were early... (read more)
2008-01-01 01:00:00

Uncovering the Mysteries of the Oceans

What is Oceanography and How to Become an Oceanographer
This article will dig into the field of Oceanography and the trends and methods developed over the past decades. Did you know that marine species compound more than 80% of the Earth’s biodiversity? Or that seaweed and other sea plants living in the ocean produce around 50% of the oxygen in the atmosphere? With this in mind, many efforts are now concentrated on studies of the ocean, such as identification of those beneficial to ocean resources and organisms that can be used as medicines for many critical ailments. Within this article, you will also get familiar with terms like biomimicry,... (read more)
2019-02-26 09:44:32

Gold, Glory, and — HYDRO!

This month marks the 555th anniversary of the death of Prince Henry of Portugal, known as the Navigator, on 13 November 1460. Henry had set in motion a series of events that led to a new understanding of the earth, the discovery of the Americas, and on a darker note, the African slave trade. One month short of thirty-two years after his death, Christopher Columbus landed on a small island of the Bahamas. Henry was driven ‘To discover what lay beyond the Canaries and Cape Bojador; ...to fulfil the predictions of his horoscope, which bound him to engage in great... (read more)
2015-12-01 09:08:42

Hydro Dam Inspection by ROVs

The inspection and maintenance of vital resource facilities is an integral part of any regional health and stability management programme. Providing consistent quality output whilst reducing inspection and maintenance costs is key for those involved in the provision of such services, and requires the monitoring and assessment of relevant new technologies and techniques. By Rob Berlijn, HydroConsult, The Netherlands Over the past forty years Remote Operated Vehicles have become a well-proven component of basic toolkits for getting work done under-water in a wide variety of industrial, scientific, military and law-enforcement activities. In many cases the impetus behind adopting and evolving... (read more)
2008-01-01 01:00:00

As it Was

by a not so old Hydrographer
"Land in sight", a cry soon to be followed by "Clew up the main", to reduce speed. It is 1606 as the Dutch ship Duyfken makes first recorded landfall in Australia. But this is not simply landfall: Duyfken, under the command of Willem Janszoon, charts the first 200NM of the Great Southland: Australia. During this exploration of the East Coast of the Cape York Peninsula contact was also made with local Aboriginal people. The Dutch, as sixteenth-century European traders and carriers of goods such as grain and herring from the Baltic and salt and spices from the Iberian peninsular, fought... (read more)
2008-01-01 01:00:00

Bio-inspired Underwater Robotics

Swimming, Swarming and Sensing
For operations in complex underwater environments, bio-inspired robots offer manoeuvrability, stealth and autonomy. They integrate propulsion and control systems into one multi-purpose undulatory propeller. By generating large counteracting forces, undulating fins generate a wide range of net torques and accelerations. Bio-inspired designs can provide stealth by imitating the motion patterns of organisms. Bio-inspiration provides strategies to integrate multimodal sensory information, and algorithms on how to form robot swarms. Multimodal sensing and swarming facilitate navigation during indeterminate tasks, such as surveying or maintenance, provide robot redundancy, and increase the temporal and spatial resolution of a mission. People have been inspired by... (read more)
2014-04-07 01:29:12
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