of zooplankton within the water column by measuring acoustic backscatter returns with ultrasonic frequencies. Other sonar targets realized from the sonar backscatter data include fish and suspended sediments. The AWCP can be operated in bottom-mounted, upward looking mode or in downward looking mode from a buoy.
www.aslenv.com
Valeport's Sound Velocity Sensors
Three Octans for Solitaire
Solitaire, the world's biggest pipe lay vessel, has been equipped with three Octans during its recent retrofit. Allseas, owners of Solitaire, specifically selected the Octans gyrocompass and full motion sensor, as it is truly solid state and therefore completely maintenance free. The Octans systems have different uses onboard Solitaire. Octans is the main IMO bridge compass system for navigational purposes. A certified ICCB is used to drive the existing stepper repeaters. An OCTANS feeds the Kongsberg DPIII class system. Octans is also coupled with the onboard USBL systems as it is highly accurate and offers low latency, time stamped heading, roll, pitch and safe heave data, which increases USBL accuracy. The retrofit of Solitaire has been performed by Kongsberg.
Valeport's approach to oceanographic instrumentation has resulted in a series of incremental improvements to its Sound Velocity sensors. The Sound Velocity sensors have had changes made to the timing system and signal processing algorithms which now enable unrivalled levels of accuracy at ±0.020 m/s. These products will also work in an operating range of 1375 to 1900 m/s, covering all known environments including the Dead Sea and Marianas Trench. In addition, the products now offer improved rapid profiling with data rates of up to 60Hz. Peak to peak signal noise remains at just ±0.002m/s.
Email: kedwards@valeport.co.uk
1500 Deep Tow, a step change in subbottom profiler technology, demonstrates the diversity of the Ixsea product range," said Ixsea's Offshore Director Richard Parkinson. "Ixsea's systems and sensors are based on state of the art technology. Delph is a powerful suite of real-time data acquisition and fully integrated processing and interpretation tools. While Shadows, the fourth generation side scan sonar, provides `more pixels per hour'."
R/V White Holly Buys SeaBat 7150
SeaBed Mapping Solutions
Ixsea launched its new seabed mapping brochure, which includes the new Echoes 1500 Deep Tow sub-bottom profiler. "The launch of Echoes
Reson won a new contract for delivery and installation of a SeaBat 7150F dual frequency deepwater sonar system on the R/V White Holly in May 2009. The delivery of the SeaBat 7150 is the first Reson sale of a deepwater system to an independent owner. Until now, the White Holly owned by Captain Vincent Backen has primarily been an educational and research vessel used in academic circles such as; Scripps, MBARI, U.S. Fish and Game, and the Smithsonian. In 2008 the White Holly performed well with the SeaBat 8160. With this new investment in the SeaBat 7150-F sonar system, White Holly Expeditions LLC will not only be able to offer Deep Water Hydrographic capabilities, but also,
Marine Technology Reporter 55
www.seadiscovery.com
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