The IBCAO 4.0 Bathymetric Chart: New Depth Map of the Arctic Ocean

Scientists from the University of New Hampshire (UNH) and around the globe have published the most detailed map to date of the Arctic Ocean seafloor, which they hope will provide a glimpse of the geologic features that could affect global climate, the melting behaviours of the Arctic ice sheets, and ultimately sea-level rise. Using all available depth data, including new state-of-the-art multibeam sonar technology, and sometimes surveying areas never before explored by ship, the new compilation now has approximately 19.8% of the Arctic Ocean seafloor mapped, representing a 13% increase from the previous chart compiled in 2012. This improvement is the result... (read more)
2020-09-15 10:08:04

iSURVEY Helps Identify North Sea Shipwreck

During a recent offshore power cable cut and seal project on the Olympic Taurus, iSURVEY were part of the team tasked with identifying a shipwreck found three years previously during a routine inspection of the Skagerrak power cable. The wreck lies 13 nautical miles from Kristiansand in southern Norway, and was investigated using an ROV-mounted multibeam echosounder. Following the survey, it was determined that the wreck was that of the long-lost German warship Karlsruhe, famous for leading the assault on Kristiansand during the invasion of Norway in 1940. Until this discovery, Karlsruhe had remained the last World War Two German warship whose... (read more)
2020-09-15 09:17:06

Fugro’s Bathymetric Lidar Improves Hydrographic Data Collection in Australia and Pacific Region

Fugro has successfully trialled a major upgrade to its Fugro LADS airborne lidar bathymetry (ALB) system. The enhanced LADS HD+ technology was developed in Fugro’s laser laboratory in Adelaide, Australia, and is a sophisticated hydrographic mapping system that accurately measures water depth in both the marine and coastal zone environments. The new advances to the system have doubled the laser speed and the swath width and improved the object detection of the system, greatly increasing data collection efficiency for nautical charting. The system builds on the proven Australian-developed LADS technology and has been designed for safe, high-speed and cost-effective surveys... (read more)
2020-09-10 02:51:26

Saab Seaeye Panther Selected for Pipeline Inspection in Gulf of Mexico

For pipeline inspection in the Gulf of Mexico, global maritime, survey and ROV services operator ACSM chose an electric Saab Seaeye Panther XT robotic vehicle over other ROV vehicle alternatives. The Panther inspected 261 pipelines totalling 2,340km in four fields in the Gulf of Mexico (GOM), at depths ranging from 15 to 130 metres, in a less than 10-month project duration. ACSM chose the electric Saab Seaeye Panther because it can perform the full scope of work needed, yet is far smaller than hydraulic equivalents. Considerable savings come from deploying the 700kg Panther system rather than the much heavier hydraulic... (read more)
2020-09-07 09:22:03

SEA-KIT USV Completes 22 Days of Offshore Operations in the Atlantic Ocean

SEA-KIT’s 12m Uncrewed Surface Vessel (USV) Maxlimer returned to Plymouth on Friday after 22 days of remote survey operations on Europe’s continental margin. Since late July, the USV has mapped over 1,000sq km of ocean floor, controlled around the clock by SEA-KIT via satellite communications from its Remote Operation Centre in Essex. Notably, the uncrewed vessel returned to Plymouth with its fuel tank still around a third full. The successful completion of this project is a major achievement for the British SME, clearly demonstrating the capabilities of their remotely-controlled USV design in terms of over-the-horizon operation, endurance and ocean-going ability.... (read more)
2020-08-20 02:03:56

New Subsea Survey Collaboration Completes First Joint Project

An up-and-coming name in the subsea sector has successfully collaborated with a leading provider of data collection to complete their first joint project in the south Caribbean Sea. Sulmara Subsea recently joined forces with XOCEAN to deliver a seabed survey off the coast of Aruba on behalf of SeaDrill using an XO-450 Unmanned Surface Vessel (USV). Operating 15km off Barcadera Port on the western side of Aruba, the USV completed the 26km2 seafloor survey in 70m of water using high-resolution multibeam. The objectives were to identify any seafloor features and to classify the seabed to allow moorings to be safely... (read more)
2020-08-14 10:32:05

TDI-Brooks Maps the Liberty Ship Reef Site George Vancouver

TDI-Brooks recently mapped the Liberty Ship George Vancouver Reef off Freeport, Texas while out on a seabed survey project with the RV Brooks McCall. The multiple multi-phase geophysical and geotechnical site surveys programme consisted of pipeline routing and subsea structures to facilitate route and project design for offshore developers. Equipment used to map the ship was a Teledyne Reson SeaBat T-20 multibeam sonar with integrated Applanix POSMV for Motion. Applying the mesh tools to the multibeam survey shows an example of the shipwreck. Texas has been involved in artificial reef development for nearly 50 years. Numerous reef building materials have... (read more)
2020-08-12 09:38:50

Using the Apache Unmanned Survey Vessel

Techniques in Bathymetric Survey
This paper explores the various features of the Apache USV series for efficient seafloor-level mapping. The CHCNAV hydrographic survey software is used for data recording and analysis. It provides results in the form of 3D models of the ground, contours and depth. (This story is brought to you by CHCNAV) Bathymetry is the study and mapping of the seabed or lake bed. It consists of obtaining measurements of the depth of the ocean or lakes and is equivalent to the mapping of the Earth’s topography. In general, only limited information is known about the seabed and lake beds. Existing maps... (read more)
2020-08-05 10:38:58

Mapping the Subsea Forests of the Mediterranean

Reviewing Remote Sensing Image Classification Techniques for Accurate Seagrass Mapping
What is the best image classification technique to optimize maps so that effective action can be taken to conserve seagrass meadows? The distribution of Posidonia oceanica seagrass meadows has been mapped by a combination of remote sensing techniques, geographical information systems (GIS) and sonar data. A fundamental, but challenging, part of this methodology is the remote sensing image classification. This article presents a review of different image classification techniques to optimise the final maps, so that effective action can be taken to conserve seagrass meadows. The degradation of P. oceanica seagrass meadows is a major concern as these marine ecosystems... (read more)
2020-08-04 09:03:05

Submerged Munitions, No Hazard Left Undetected

Minimum Requirements for Munitions Detection at Sea
Munitions in the sea pose a risk to the sustainable development of the ocean economy. In particular, they are a global challenge during the construction of wind parks, pipelines and other infrastructure. To ensure high-quality performance during the execution of the necessary maritime munitions detection and clearance operations, industry experts and scientists from Germany have defined a set of requirements. These are particularly important in the detection phase which requires the attention of hydrographic surveyors. Safe access to large areas of the seafloor is a prerequisite for offshore economic development. However, this ability has been compromised by the presence of... (read more)
2020-07-20 02:06:12
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