Three Export Cable Circuits for Offshore Wind Farm

Royal Boskalis Westminster N.V. (Boskalis) has been awarded the offshore export cable installation contract for the Hornsea 2 offshore wind farm. The contract with a value greater than €100 million was awarded by Ørsted Wind Power A/S and consists of three export cable circuits with a total length of approximately 380 kilometres. Installation and Protecting The project scope includes the preparation of the offshore export cable route (geophysical survey, boulder clearance and seabed levelling through dredging), and the installation and protection of the cables. The three 130 kilometre long export cables will connect the offshore substation to the onshore substation... (read more)
2019-04-29 12:46:12

Best Practices and Inspiring Bathymetric Lidar Projects

Bathymetric Lidar is a technique to capture geospatial data of coastlines and (shallow) waters. The method has the potential to facilitate the fast and efficient creation of hydrographic data. More and more users are turning to it to support many new and different applications. At Hydro International, we have selected a series of articles on this technique, ranging from case studies that zoom in on some challenging projects using bathymetric Lidar in combination with other survey methodologies, to in-depth articles focusing on the latest trends and developments relating to this hydrographic surveying technology. Acoustically Aided INS and Lidar Aerial mobile mapping using Lidar and GNSS-aided inertial navigation... (read more)
2018-06-26 11:07:44

Capt. Albert E. Theberge

Albert E. Theberge (Skip)'s career as a coast surveyor followed a somewhat ­traditional path. He graduated from the Colorado School of Mines in 1969 as a Geological Engineer and entered ESSA Corps, a descendant organ­isation of the commissioned service of the United States Coast and Geodetic Survey. In 1970 this became NOAA Corps with the formation of the National Oceanic and Atmospheric Administration (NOAA) within the US Department of Commerce. He retired from NOAA Corps in late 1995, with field stops along the way including four NOAA survey ships, a few field parties involved in such matters as astronomic latitude and longitude, levelling,... (read more)
2017-05-31 10:02:46

Tugs to Be Equipped for Dredging and Surveying Roles

Baggerbedrijf De Boer B.V. (Dutch Dredging B.V.) has ordered two custom-made, special-purpose tugs to be built at Damen Shipyards Hardinxveld in The Netherlands through the subsidiary De Boer Remorquage SARL. The larger of the two, the WID 2915, will be configured for a variety of roles including dredging using the Air and Water Injection Dredging (AIRSET) method. The smaller ASD 2310 SD (Shallow Draught) tug will be fitted out to operate the equipment needed for bed-levelling and will also carry out surveying activities. The tugs are for a 10-year contract with Grand Port Maritime de Guyane in the ports of... (read more)
2017-02-23 01:40:56

Tides Workshop 2016

The Permanent Committee on Tides & Mean Sea Level (PCTMSL) Bureau in Australia has sponsored a tides workshop aimed at raising the level of tidal knowledge of those people involved in marine operations, hydrographic surveying and data collection. The workshop was conducted at the Tidal Unit, Bureau of Meteorology, Adelaide, and consisted of a mixture of theory and hands-on sessions over three days, from 16 to 18 May 2016 with a field trip on the 19 May 2016. The topics that were covered included tidal theory, storm surges and extreme events, mean sea level and climate variability, climate change and... (read more)
2016-06-06 01:19:00

Integrating UAS and Multibeam Echosounder Data

Creating a 3D Landscape Model of a Gravel Quarry in Germany
Knowing the volume of material present in a gravel quarry can make the difference between profit and loss. A gravel quarry in Hartheim am Rhein, southwest Germany, is partially covered by artificial lakes. To determine the volumes of the above-water gravel dumping grounds and to map the bottoms of the lakes, high-precision data captured by an unmanned aerial system (UAS) was combined with multibeam echosounder data obtained by boat. Read the full article for a description of acquisition of the two types of data, how they were integrated and the benefits for the mining company. A gravel quarry is associated with diggers, rough... (read more)
2016-04-25 10:08:32

Searching for HMS Terror

Knowledge Gained in the Search for Franklin
“We know where the target is not located” is the only guaranteed result of any search expedition. This statement does not make for exciting headlines, however, the value of knowledge gained during the search itself and its many benefits to a variety of end-users, cannot be easily dismissed. The 2015 Franklin Expedition search coordinated by Parks Canada was the continuing multi-year, multi-partner effort that saw the discovery of HMS Erebus in September of 2014. In this article we will discuss the knowledge gained and multiple uses of the data collected toward our conclusion of verifying where HMS Terror is not... (read more)
2016-04-04 09:52:54

CEE JET Hydrographic Survey Jet Ski Delivered for Gold Coast Beach Surveys

After learning about the prospect of using a jet ski with a singlebeam echosounder to conduct bathymetric surveys in a fraction of the time, the Gold Coast council in Australia purchased its first CEE JET hydrographic survey system from CEE HydroSystems. With a survey-grade CEESCOPE singlebeam echosounder, RTK GNSS, on-board computer for data collection and HYPACK software, the CEE JET allows collection of high-quality bathymetry data in the often substantial area of the surf zone. Australia's Gold Coast stretches along 57 kilometres (35 miles) of coastline and the region is home to over half a million people. In order to... (read more)
2016-02-23 09:37:21

Benefits of UAS Breakwater Monitoring

The North Sea Canal in The Netherlands connects the Port of Amsterdam with the sea. The two breakwaters at the mouth of the harbour in IJmuiden are usually monitored on displacement of basalt block by airborne Lidar and on subsidence by annual levelling of permanent points. Could a camera-equipped UAS survey conducted simultaneously with a bathymetric survey provide information of equivalent accuracy? A recent study has shown that it could: time series of 3D models of the breakwaters are useful for erosion and subsidence monitoring. By Pieter Franken, Skeye BV, The Netherlands Monitoring of the breakwaters at IJmuiden, The Netherlands,... (read more)
2014-08-05 10:45:21

UAS at the Beach

Merging UAS DEM and Bathymetric Depths to Monitor Breakwater Subsidence and Erosion
The North Sea Canal connects the Port of Amsterdam with the sea. The two breakwaters at the mouth of the harbour in IJmuiden, The Netherlands, are usually monitored on displacement of basalt block by airborne Lidar and on subsidence by annual levelling of permanent points. Could a camera-equipped UAS survey conducted simultaneously with a bathymetric survey provide information of equivalent accuracy? Here, the author shows that it could. Time series of 3D models of the breakwaters are useful for erosion and subsidence monitoring. Monitoring of the breakwaters in IJmuiden, The Netherlands, is currently carried out using airborne Lidar together with... (read more)
2014-07-17 02:36:42
Search Filter