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

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

All American Marine Wins NOAA Research Vessel Contract

The National Oceanic and Atmospheric Administration (NOAA) has awarded All American Marine (AAM) a contract to construct a 50ft aluminium research catamaran for the Olympic Coast National Marine Sanctuary. The twin-engine Teknicraft Design vessel will be constructed by AAM to USCG Subchapter T standards. The vessel will carry up to 18 personnel on board on a near-coastal route. Olympic Coast National Marine Sanctuary (OCNMS) includes 3,188 square miles of marine waters off the rugged Olympic Peninsula coastline. The sanctuary extends 25 to 50 miles seaward, covering much of the continental shelf and several major submarine canyons.  The semi-displacement catamaran hull for... (read more)
2020-08-04 08:36:34

NOAA Selects Woolpert for US$40M Shoreline Mapping Support Services Contract

Woolpert has been selected as a prime consultant for the National Oceanic and Atmospheric Administration’s (NOAA) Shoreline Mapping Support Services contract. The firm and its partners will provide updated charting data and analytics of the national shoreline for use in nautical charts, to support maritime navigation, to define territorial limits and to manage coastal resources. The five-year indefinite delivery, indefinite quantity contract will support NOAA’s National Ocean Service (NOS), National Geodetic Survey (NGS) and Remote Sensing Division (RSD). The contract has a ceiling of US$40 million. Extensive data acquisition and processing The Shoreline Mapping Support Services contract is being administered by... (read more)
2020-07-28 08:33:26
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