2017-03-10 11:34:34

Sonar in Fisheries Research

A year round study on fish migration
Fisheries acoustics has its origin in the marine environment. Only with the development of small elliptical beams has it become possible to apply sonar in shallow freshwater. Since 1992 the Organisation for the Improvement of Inland Fisheries uses sonar for fisheries research, in The Netherlands. The mean application of sonar in freshwater is fish stock assessment by means of a mobile survey. In addition, sonar equipment can be applied at a fixed location to study fish migration. This gives information on the exact timing, direction and relative number of migrating fish over time. To be sure of the absolute number,... (read more)
2008-01-01 01:00:00

Sonar Training Seminar

Black Laser Learning has opened the registration for their fifth live intensive three-day seminar that will take place in Annapolis, Maryland, 8th to 10th February 2011. The annual event is co-sponsored by International Industries, Inc., leaders in hydrographic and oceanographic products, and is aimed at providing a comprehensive overview of all types of sonars and their capabilities for government, military and law enforcement personnel. (read more)
2010-12-15 04:33:10

Multibeam Sonar Training Course

This comprehensive six-day course is designed to provide a theoretical and practical background in multibeam survey technology and techniques for hydrographic surveys, continental shelf boundary delimitation, offshore engineering, harbor dredging, fisheries habitat, route survey and scientific research, and provides overviews of: • the technology and problems associated with shallow water multibeam surveys,• processing and visualization techniques designed to address the complexities of swath mapping, • constraints on using swath bathymetry to produce highest quality data. (read more)
2016-09-12 11:13:49

‘Killer’ AUV Sonar System

In January 2001, C&C Technologies (C&C), a company based in Lafayette (Louisiana, USA), introduced the first commercially successful autonomous underwater vehicle (AUV) to the offshore industry. The AUV’s survey sensor suite, which included an EdgeTech side-scan sonar and sub-bottom profiler, performed well in the Gulf of Mexico and Brazilian offshore environments. However, West Africa proved more challenging – particularly for the sub-bottom profiler. C&C soon began searching for alternative technologies to provide better sub-bottom profiler penetration and higher resolution side-scan sonar imaging.Jim Chance, C&C Technologies (USA) Art Kleiner, EdgeTech (USA)<P> Narrator: Fast forward to the early autumn of 2004… C&C... (read more)
2008-04-02 12:00:00

Obstacle Avoidance Sonar

Sonardyne International, UK, has announced the launch of its new Navigation and Obstacle Avoidance Sonar, NOAS, at NAVDEX 2013 in Abu Dhabi. Designed for use on submersible vehicles, NOAS enables faster, safer and more efficient navigation by detecting and classifying potentially hazardous underwater obstacles in its path. Unveiled on the first day of the exhibition, NOAS provides a unique combination of very long range 2D navigation performance, 3D object detection and class leading intruder detection in a single compact sonar. In 2D mode NOAS provides the crucial long range navigation information enabling underwater vessels to steer a safe course. When... (read more)
2013-02-19 04:26:09

Portable Side-Scan Sonar

The HMS-1400 Side-Scan Sonar System is a part of Falmouth Scientific's new Hegg Marine Solutions Division, specialising in products and services for the hydrographic and marine survey markets. The HMS-1400 is a low-cost, portable, single- or dual-frequency side-scan system. Powered by GeoDAS software from Oceanic Imaging Consultants, the HMS-1400 comprises a portable tow fish and waterproof topside case containing the data acquisition, control and power supply.  The HMS-1400 is ideal for harbour security and hazard surveys, search and rescue operations, and small-vessel surveys. Dual-frequency options from 100 through 1200 kHz max allow for best range/resolution selection for specific applications. The... (read more)
2010-03-16 04:12:33

Versatile Side-scan Sonar

JW Fishers developed a side-scan towfish with adjustable transducers. The angle of the transducers can be changed by rotating the tail section of the towfish. This allows the sonar to scan the hull of a ship for attached contraband compartments and inspect the face of a dam, bridge, or oil platform for explosive devices. Already several departments have purchased these side scans with the new adjustable transducers including the Escambia Sheriff’s Office in Pensacola (FL, USA) and the Washington County Sheriff’s Office in Stillwater (MI, USA).  Jim Anderson of Washington County’s Water Recovery Unit says to be impressed with the... (read more)
2008-07-02 09:17:29

High-definition Imaging Sonar

US-based Sound Metrics has launched its newest product, the ARIS Explorer line of high-definition imaging sonar. The device offers detailed and video-like resolution. There are three ARIS Explorer models: the 3000 (3MHz) for highly detailed close-up inspection, the 1800 (1.8MHz) for general purpose detection and inspection, and the 1.2MHz which allows long-range location, detection and inspection. An additional diver-held model along with several market specific software modules and enhancements are to follow. For over ten years, Sound Metrics been offering the DIDSON imaging sonar which is in use in many underwater projects, ranging from protecting endangered fish species to oil... (read more)
2012-06-05 02:17:35

SeaKing Hammerhead DST Sonar

Tritech International has launched its new addition to the SeaKing family of imaging scanning sonar products - the Hammerhead scanning sonar. The unit can create higher resolution imagery than comparative mechanical scanning imaging sonars by utilising a large transducer aperture, very fine mechanical step size and proven Digital Sonar Technology. As standard the SeaKing Hammerhead sonar has two frequencies of operation: a high chirped 935 kHz frequency to enable high resolution imagery, and a second chirped frequency, 675 kHz, to allow for long range capability. The wide transducer allows for a very narrow horizontal beam to be created on both... (read more)
2010-03-05 01:48:00
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