Data Comparison of the SeaBat7125 and 8125 Multi-beam

Survey specifications such as the Land Information New Zealand (LINZ) require a specified number of hits on a given target size and a specified overlap in Special Order areas. In practice, the surveyor has two options to increase the number of hits: reduce the range to increase number of hits or slow down the vessel to increase sounding density. A multi-beam echosounder (MBES) with an equi-distance possibility increases the number of hits at the sides of the swath. This article describes a comparison survey with two SeaBat MBESs: one with equi-angle mode and one operated in equi-distant mode.<P> With beams... (read more)
2008-05-30 12:00:00


From data loggers to high-memory adaptors
RBR Ltd has seen steady growth during the past eight years, especially in oceanography and environmental monitoring instruments. Each of these products has its own interesting story, but the genesis of the present RBR lies in its development of the first autonomous data-logging product in 1985. Established in 1976 as a company offering contract R&D, RBR Ltd served government and education institutions for its first twenty years. Along the way it produced many products based upon collaboration with the customer institution. These included a unique bore-hole locator used in mining (the very first contract, and still being made), a plant... (read more)
2008-01-01 01:00:00

Student Autonomous Underwater Challenge - Europe

The Student Autonomous Underwater Challenge – Europe (SAUC-E) is an annual event providing an opportunity for student-led teams to design and build a small autonomous underwater vehicle (AUV) to compete over a variety of challenges. The University of Southampton team (Figure 1) – the winners of SAUC-E 2007 – are aiming to retain their title at the 2008 edition to be held from 7 to 11 July at IFREMER in Brest (France). A new vehicle is in the latter stages of development for this year’s challenge to try to emulate the achievements of its predecessor.<P> The Student AutonomousUnderwater Challenge –... (read more)
2008-07-04 12:00:00

Optimizing a Low-cost Multi Sensor System for Hydrographic Depth Determination

Surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. With shallow water surveys not required to be performed with the accuracy and precision of industrial projects, surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. With this low-cost demand rising, the investigative development of these products has become a scientific research issue. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years.  The Old Openseamap Project During a project with, a Multi Sensor System (MSS) including an Echo sounder, GPS and inertial measurement unit (IMU) was built up and tested. Despite... (read more)
2019-04-08 01:44:05

Imagenex Technology Corp

Striving for Innovation in Sonar Development
Imagenex Technology Corp, headquartered in Port Coquitlam, just outside Vancouver, specialises in advanced acoustic underwater sensors in combination with graphic visualisation tools. The Canadian firm endeavours to apply a unique approach to everything it does, from corporate structure to products. Company president Willy Wilhelmsen's business card offers a revealing insight into the philosophy of Imagenex Technology Corp, based in British Columbia, Canada, and a producer of high-resolution sonar equipment. The president purposely omits his title from his business card. He feels the company should not look as if it belongs to him; it belongs to the employees. From managing director... (read more)
2008-01-01 01:00:00

High-resolution Structural Inspection of a Flooded Tunnel

Using BlueView T2250 360° Multibeam Profiling Sonar and Teledyne PDS Software
Acquiring accurate data on the structural integrity of submerged tunnels, as well as shafts and underwater caverns, has long been a challenging and costly problem for water companies, hydroelectric schemes and mine operators alike. While dewatering of tunnels is one option this can cause additional stress which can cause harm to such assets thereby compounding the problem. This article has been brought to you by Teledyne BlueView and Teledyne PDS Dewatering can also be a costly process to undertake and may also lead to loss of productivity in some circumstances. While Remotely Operated Vehicles (ROVs) have been used for some years... (read more)
2017-02-06 09:13:22

Ocean Business Ready for Business

Hands-on Update on Ocean Technology – Science and Business
The bi-annual event Ocean Business is coming to the NOC, Southampton from 4-6 April 2017. Three days of ocean technology engineering and science, knowledge sharing, hands-on training and demos as well as networking. The exhibition space is completely sold out, including more than 340 exhibitors. A selection of the businesses represented give a taster of their innovations in this preview. Better still, of course, is to come and see and experience for yourself! Ocean Business is more than just a trade show. There will also be seminars, workshops by suppliers, a general conference as well as a conference organised by... (read more)
2017-03-13 02:39:32

Surface Imaging Capabilities on Marine Hydrographic Vessels

In a combined effort of the National Oceanic and Atmospheric Administration and private industry (Applanix and Riegl), two different but complimentary technologies were tested in the marine survey field to find a more efficient, higher-accuracy and safer alternative for traditional shoreline verification methods. This article describes the tests and the encouraging good results with this videogrammetry and laser scanning technology.<P> Vessel-based shoreline verification is a laborious, exacting and often dangerous element of nautical charting. During this process, a boat is deployed into the near-shore region to verify shoreline information extracted from aerial photogrammetry. Near-shore features such as piers, rocks, islets... (read more)
2008-01-19 12:00:00

Kongsberg FEMME Conference

A large portion of the hydrographic community came together at the thirteenth Kongsberg FEMME conference in Trondheim, Norway. Participants exchanged thoughts, ideas and experiences on hydrographic-related topics and Kongsberg subsea systems. Many new Kongsberg products were demonstrated, including the new Kongsberg EM2040 multi-beam echo sounder.     All the latest Kongsberg products and features were demonstrated by Kongsberg. In the spotlight was the new Kongsberg EM2040 multi-beam echo sounder. This new  multi-beam echo sounder has new features such as dual swath per ping; roll, pitch and yaw stabilisation and near-field focusing.   Mid-water and backscatter information are finding their ways... (read more)
2011-04-27 01:44:50

Improved Long-range Sonar Tested Successfully

Scientists from the Habitat Research Group (HRG) are conducting studies to identify the essential habitats of eastern Bering Sea species. This includes work to identify suitable predictor variables for quantitative habitat models and to develop tools to map these variables over very large areas. The Klein 7180 long-range side scan sonar (LRSSS) is a new technology that was purpose-built for fish-habitat research. It is distinguished from all other sonar systems by its ability to collect fully adjusted quantitative information about seafloor characteristics and is thus ideally suited for modelling applications. The very large swath coverage (to 1.0km) and high maximum... (read more)
2012-06-07 09:19:36
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