GLONASS, GPS and GALILEO Present and Future Aspects

Global Navigation and Hydrography is the theme of this issue. GALILEO has received a ‘green light’, GPS has planned some important improvements and GLONASS has entered on a significant development programme. Time for HI to ask experts involved in each GNSS for their opinion on certain topics and finally to put the question: ‘What is in it all for us surveyors?’ The experts interviewed are: Dr Vidal Ashkenazi (GALILEO), Dr Keith McDonald (GPS) and Dr Boris Shebshaevich (GLONASS). The planned GALILEO-system involves some discussion in connection with already present GNSS systems and some of our questions had a political aspect.... (read more)
2008-01-01 01:00:00

Meet the Hydro International Team at Oceanology International (A-F)

In the third week of March, the entire marine world will be gathering in London, as this is where the biannual Oceanology International event is taking place. The exhibition and the conference bring together technological and scientific developments. With over 550 exhibitors and a state of the art conference programme OI12 is definitely the place to be. OI12 will be held from 13 to 15 March at the ExCel Exhibition and Conference Centre in London’s Docklands. The organisers are expecting at least 7,000 visitors to attend. Hydro international will of course be present. We not only have a stand (No.... (read more)
2012-03-08 09:56:00

Oceanology International 2010 Preview (2)

This is the continuation of the Oceanology International Preview. For companies A - L, see part 1  MacArtney Underwater Technology Group MacArtney will be introducing their newest innovation in multiplexers - the NEXUS MK E electrical multiplexer, which is designed to the same high standards as the fibre optic multiplexer range with the telemetry part of the multiplexer adapted to non-fibre optic cables. Another highlight will be the demonstration of a working active heave compensation winch, the Cormac 3 Stainless Steel winch. It will demonstrate load stability during vessel movement on the sea. MacArtney will show their Focus ROTV, camera... (read more)
2010-03-01 05:03:47

Oceanology International 2016 Provides Update on Ocean Technology

Promising Event for Oceanographic and Hydrographic Community
Hydro International traditionally prepares a preview of Oceanology International to help you prepare for the highlights of what businesses on the show floor will be presenting. The Hydro International preview offers you a selection of the more than 350 companies from 32 countries that will be present at the trade show. The total surface is over 8,000 square metres so consider wearing your walking boots!  Joost Boers, editorial manager, Hydro International There will also be is a conference during Oceanology focusing on streams like Trade & Innovation; Marine Technology and Services Sector Role in the Blue Economy; Marine Renewables; Positioning & Metrology; Green Shipping;... (read more)
2016-03-01 11:47:03

Grounding of the Queen Elizabeth 2 (response)

The Rest of the Story
Last month we brought you the story of the famous Cunard cruise liner Queen Elizabeth 2 (QE2), which grounded on 7 August 1992 off the coast of Martha’s Vineyard and the state of Rhode Island. Captain Lusk stated that the US judicial system arrived at the wrong decision regarding who was at fault for the QE2 grounding and suggested that the US agency for this survey, the US Coast and Geodetic Survey, predecessor to the National Oceanic and Atmospheric Administration (NOAA), should have investigated and determined the shoal depth. On this page we give NOAA the opportunity to respond to... (read more)
2009-06-26 12:00:00

Meet the Hydro International Team at Oceanology International (R-Y)

In the third week of March, the entire marine world will be gathering in London, as this is where the biannual Oceanology International event is taking place. The exhibition and the conference bring together technological and scientific developments. With over 550 exhibitors and a state of the art conference programme OI12 is definitely the place to be. OI12 will be held from 13 to 15 March at the ExCel Exhibition and Conference Centre in Londonfs Docklands. The organisers are expecting at least 7,000 visitors to attend. Hydro international will of course be present. We not only have a stand (No.... (read more)
2012-03-08 10:09:21

Meet the Hydro International Team at Oceanology International (G-P)

In the third week of March, the entire marine world will be gathering in London, as this is where the biannual Oceanology International event is taking place. The exhibition and the conference bring together technological and scientific developments. With over 550 exhibitors and a state of the art conference programme OI12 is definitely the place to be. OI12 will be held from 13 to 15 March at the ExCel Exhibition and Conference Centre in Londonfs Docklands. The organisers are expecting at least 7,000 visitors to attend. Hydro international will of course be present. We not only have a stand (No.... (read more)
2012-03-08 10:02:38

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

The MRU and SRF Aligned (I)

With increasing accuracies of positioning and multi-beam systems, alignment of the motion reference unit (MRU) is becoming increasingly important. Although most (if not all) multi-beam surveyors use the patch-test to resolve the angular offsets between the multi-beam head and the MRU, this test does not give us the angular offsets between the MRU and the ship’s reference frame (SRF). In addition to this, any misalignment between the vertical rotation axis of the MRU and the SRF (yaw-angle) will introduce cross-talk between pitch and roll.<P> The alignment of the threeaxes is also becoming increasingly important at shallower depths as we should... (read more)
2009-01-05 12:00:00

Technology in Focus: Underwater Electromagnetic Propagation

Re-evaluating Wireless Capabilities
Underwater wireless communications links have almost exclusively been implemented using acoustic systems. Optical links have proved impractical for many applications. Although underwater radio links were experimentally evaluated in the pioneering days of radio, they did not meet the requirements of the time. Given modern operational requirements and digital communications technology, the time is now ripe for re-evaluating the role of electromagnetic signals in the underwater environment. Background Underwater electromagnetic communications have been investigated since the very early days of radio, and again received considerable attention during the 1970s. Then terrestrial radio typically delivered manual digital communications (Morse code) or full... (read more)
2008-01-01 01:00:00
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