Tritech SeaSprite Sonar in Antarctica

Tritech's SeaSprite sonar helps to map new locations under the frozen surface of the Antarctic Ocean that have previously been too remote or too deep to access. The three year SCINI (Submersible Capable of under Ice Navigation and Imaging) project team members began their research at The McMurdo Station, Antarctica, in October 2007.   Extract from a diary entry written by BLee Williams, one of the members of the SCINI team: Monday, November 19, 2007: Some Lessons Learned. I have been in Antarctica for coming on 18 days, and we have had VideoRay in water 10 of them. Including the... (read more)
2008-01-09 10:52:22

Search & Recovery Side Scan Sonar

EdgeTech has introduced their 4125-P Portable Search & Recovery Side Scan System. The 4125-P is a digital single or dual frequency 400/1250 kHz system that produces very high resolution imagery. Designed with Search and Recovery and Harbor Security in mind, the system can quickly be deployed by one person within minutes from a very small boat and a 12-24 VDC power source. The 4125-P comes standard with a lightweight towfish in a rugged portable carrying case, portable waterproof topside processor with laptop computer and 50 metres of tow cable.       (read more)
2007-10-08 10:44:11

Drumgrange Wins Defence Sonar Contract

Drumgrange has won a major defence contract for the support and advancement of sonar systems. The contract will provide dedicated operational support for the next three years and involves installation, fitting, de-fitting, and sea calibrations. In competition with other major UK defence contractors, Drumgrange offered the best technical ability at the most competitive price, backed by a customer service track record. Drumgrange designs, develops and manufactures complete sonar system solutions and has both analogue and digital systems in service with the Royal Navy. The company also supplies communications systems, tactical systems, and training systems to defence agencies and leading electronics... (read more)
2007-04-10 10:12:19

Towed Underwater Camera and Sonar

A new concept of towed underwater vehicles has been presented by Oceanflite. Through the shape of their bodies, the TUVs can fly underwater. The depth of their flight is determined by the speed of the boat: the faster the TUV is pulled, the deeper it will float. The TUVs can be euqipped with sonar or an underwater camera, making the device fit for surveying jobs, fish finding or underwater inspections. Images can be displayed on an in-boat monitor. (read more)
2006-11-20 12:00:00

Sonar for Enhanced Mammal Detection

Gemini SeaTec, UK, provides an early warning of the presence of marine mammals in the vicinity of marine current turbine structures. The Gemini SeaTec system has been successfully field-tested on the Marine Current Turbine (MCT) SeaGen installation in Strangford Lough, Northern Ireland, overseen and tested by the Sea Mammal Research Unit (SMRU) Ltd. The latest version of Gemini SeaTec system includes improved software algorithms for analysing moving marine life targets according to their size, shape and swimming behaviour. Targets are categorised using a traffic light system, indicating the probability that a moving target is a marine mammal. ‘Possible’ (green) targets... (read more)
2012-05-23 10:35:41

High-resolution Sonar for Engineering

Integrating Multi-beam and Inertial Navigation
In the event of an incident or inclement weather such as a hurricane, an engineer may be required to assess the situation of any subsea structure. Here, the ability to produce quick, accurate and dimensionally correct survey images in an easy to read format is imperative to enable any remedial action such as vessel position, lifting, deployment of ROVs, safe working areas and diving operations. The following ROV project was undertaken at a depth of approximately 80 metres (262 feet) on an artificial reef in the Gulf of Mexico (Eugene Island block 338 oil field) where there are several disused... (read more)
2012-04-19 04:09:56

Kraken Sonar for ECA AUV

Kraken Sonar (Canada) has been awarded a contract valued at over USD325,000 by ECA Robotics (France) to supply and help integrate its AquaPix Miniature Interferometric Synthetic Aperture Sonar and Embedded Real-Time SAS Signal Processor on the A18D AUV. Kraken's AquaPix is a sonar system providing military grade technology providing 3D seabed imaging, faster data processing and a lower cost than conventional sonar. AquaPix is designed for operation on AUVs, manned and unmanned surface vessels and towed bodies. The modular system uses the latest electronics, transducer arrays and signal processing software optimised for the demanding size, weight, power and cost constraints... (read more)
2015-08-12 09:52:18

EDI Releases CHIRP Sonar Tester

EDI has released the DSTS-5A/2C computer-controlled CHIRP and fixed sonar test set. Developed for technicians and engineers alike, the DSTS-5A/2C is a solution for test, evaluation and design of depth sounders and sonar systems. The DSTS-5A/2C emulates bottom echoes as well as fish echoes and allows the user to vary depth, reply level, period, pulse width and fish arcs. Interfaced through an RS-232 port, signal variables are controlled using the supplied Windows and Linux applications. Measurements of the pulse are displayed on the computer and commands can be sent over any terminal interface, this allows batch-scripts for automated testing suites... (read more)
2015-05-04 08:45:41

Tri-frequency Sidescan Sonar System

EdgeTech, USA, has released an AUV-based sonar system that provides three sidescan sonar frequencies as well as subbottom profiling capabilities in one compact and integrated system. One of the recently delivered EdgeTech 2205 tri-frequency systems was configured to operate at 230kHz, 540kHz and 1,600kHz. This configuration provides more flexibility for AUV operators and allows them to collect different sets of data for different missions without reconfiguration. The lower frequency provides a 450 metre swath while the higher frequency is suited for high resolution operations. The 1,600kHz frequency can provide across-track resolution of less than one centimetre. In the middle, the... (read more)
2015-02-05 08:51:43

Quick-deploy ‘PulSAR’ Sidescan Sonar

Kongsberg Maritime, Norway, has introduced a tow fish sidescan sonar for use in search and recovery (SAR) missions as well as underwater inspection, engineering and scientific surveys. Developed by Kongsberg Geoacoustics, PulSAR is designed for intuitive operation and easy deployment by non-specialised personnel, enabling effective short-notice surveys using vessels of opportunity. The PulSAR system acquires high resolution acoustic images of the seabed using a compact, rugged stainless steel tow fish that is operated with a water protected (IP66) deck unit and small cable hand reel. The system can be deployed on small vessels such as open RIBs. Large areas can... (read more)
2015-01-14 10:25:43
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