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

Teledyne CARIS AI Software Contributes to Successful UTAS USV Mission

Teledyne CARIS, a Teledyne Technologies company, was an integral part of the illustrious team involved in the ground-breaking uncrewed offshore survey mission in the Atlantic Ocean. Teledyne CARIS’ Mira AI and CARIS Onboard software were present on the vessel to enable autonomous survey and real-time processing operations. The mission’s Uncrewed Surface Vehicle (USV) built by SEA-KIT mapped over 1,000 sq. kms of the ocean floor in 22 days, while being continuously monitored via satellite communications at its Remote Operations Centre in Essex, United Kingdom. A specialized team comprised of the GEBCO-Nippon Foundation Alumni Team operated the survey equipment and provided... (read more)
2020-09-11 11:38:00

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

British Royal Navy Surveys Beirut's Harbour for Hazards

The Royal Navy survey ship HMS Enterprise has called at Beirut to survey the harbour and deliver humanitarian supplies after the devastating explosion earlier this month. Enterprise has spent the past several weeks loading stores from the RAF Akrotiri air base in Cyprus, then carrying them across the Mediterranean to Beirut. The delivered goods include 500 canvas cots, 112 tents and 5 field kitchens. The supplies will be able to house and feed up to 500 soldiers from the Lebanese Armed Forces (LAF) who are working on the relief operation. With supplies on board, Enterprise sailed to Beirut last week. She berthed adjacent to the capsized cruise... (read more)
2020-09-04 10:31:14

Unmanned Boat Used in High-salinity Brine Lake

In early July 2020, an OceanAlpha ME120 unmanned surface vessel (USV) joined the national potash mining project in Lop Nur in the Chinese province of Xinjiang to conduct routine bathymetric surveys. Lop Nur used to be the largest lake in north-western China before it dried up in 1972. Known as the ‘Sea of Death’, Lop Nur is located in the south-eastern part of Xinjiang Uygur Autonomous Region. It is now an enormous desert, with no grass, streams or birds, where summer temperatures can reach record highs. So, what is an unmanned boat doing in a dry lake? Following a discovery by... (read more)
2020-09-01 12:47:35

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

Bathymetry and the Power of Sound

How a Single Device Can Change Our Understanding of the Depths Below Us
The single-beam echosounder has come a long way. First developed in the early 20th century in response to the RMS Titanic disaster of 1912, early models used a Fessenden oscillator to generate a signal of around 1kHz. The resulting broad beam was suitable for depth measurements and the location of large targets – a huge technological step forward – but incapable of the fine resolutions required to gain information as to the nature of the seabed. Jump forward a little over a century and the picture is very different. Advanced systems, working across multiple frequencies, can operate with beam widths as... (read more)
2020-08-18 08:35:03

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
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