Turbulent Flow Affecting Tidal Turbines

As the result of a collaborative study with Edinburgh University, UK, Nortek has developed a single beam profiler for the measurement of turbulent flow affecting underwater turbines.    When coupled with computer-controlled pan and tilt mechanisms, groups of Nortek single beam profilers can be focused on target points both in front of and behind the turbine. By synchronising the firing sequence of the profilers, 3D current measurements can be obtained at these focus points with sampling rates of up to 2Hz. The same single beam profilers can also be fitted to the nose cone of any turbine, thus providing a... (read more)
2012-04-16 02:56:06

LinkQuest at OI

LinkQuest is to exhibit the FlowQuest acoustic current profilers and NavQuest Doppler velocity logs. Also in booth H10 will be the newly released small, light-weight FlowQuest 2000 acoustic current profiler which operates at 2 MHz with a blank distance as short as 10cm. The FlowQuest 2000 acoustic current profiler is ideal for measuring currents, flows and discharge in shallow waters. (read more)
2010-02-17 01:23:41

Surface Wave Measurements by Current Profilers

Possible, but only within limits
Sophisticated wave models like SWAN (Simulating Waves Nearshore) are used to calculate extreme wave and water heights that may occur in the North Sea. Accuracy of these models and predictions rely strongly on validation by wave measurements. Current profilers offer perspectives for such measurement of waves in shallow waters. The accuracy of these is the subject of study at Rijkswaterstaat (The Dutch Ministry of Transport, Public Works and Water Management). Users and manufacturers of all brands of current profilers have shown that it is possible to derive wave information from the data produced by these instruments. But how accurate do... (read more)
2008-01-01 01:00:00

Valeport's Upgraded SWiFT SVP Will Operate Down to 500 Metres

Valeport, a UK-based manufacturer of oceanographic and hydrographic instrumentation, has upgraded its SWiFT SVP. This sound speed profiler now provides enhanced versatility and deployment. An improved depth rating and increased pressure accuracy will become standard on the SWiFT profiler. Following customer feedback, Valeport has introduced this evolution of the SWiFT profiler which is designed with the intention of a seamless workflow at its core, and delivers high accuracy sound velocity, pressure, temperature, salinity and density measurement coupled with the convenience of Bluetooth connectivity, rechargeable battery and an integral GPS module to geo-locate each profile. Increased Profiler’s Pressure Accuracy The improved SWiFT will now operate down... (read more)
2019-08-09 10:15:11

Discharge Measurement

LinkQuest's FlowQuest acoustic current profilers have been extended with a Discharge Measurement function which can be used to measure the discharge in rivers, estuaries, natural streams and constructed channels. This function comes in the form of an option for the FlowQuest 600 and 1000 acoustic current profilers.   For the discharge measurement application, the standard FlowQuest 600 or 1000 acoustic current profiler is steadily deployed on a moving vessel such as a catamaran, a small floating platform or a small boat with the transducer pointing downward. The profiler measures the water velocities, the ship's velocities, the depth and other related... (read more)
2007-12-05 11:05:54

Two ParaSound P70 Sub-bottom Profilers for Chinese Research Institutes

Guangzhou Marine Geological Survey (GMGS) and Qingdao Institute of Marine Geology (QIMG) have awarded Teledyne RESON contracts to supply a full ocean depth sub-bottom profiler system for their new-build survey vessels. Both research institutions belong to China Geological Survey and work in the field of marine resources and geology. GMGS is one of the most experienced users of Teledyne RESON deep water sonar in East Asia. Its R/V Hai Yang 4 is equipped with a HydroSweep MD/30 deep water multibeam echosounder, and installation of a ParaSound full ocean depth sub-bottom profiler will be finished after the Chinese New Year celebrations.... (read more)
2016-01-25 09:57:40

C- Surveyor III Completes Noble Energy Project

C&C Technologies recently completed a survey for Noble Energy utilising its new C-Surveyor III AUV. The C-Surveyor III completed the 81NM survey in the Gulf of Mexico with water depths ranging from 4100 to 4700 feet. C&C’s new 4500-metre C-Surveyor III AUV includes a multibeam echosounder, chirp side scan sonar, chirp sub-bottom profiler and CTD system. The customised sub-bottom profiler on board is outfitted with narrow transmit and receive beams to permit significantly deeper seabed penetration.  In addition to the sub-bottom profiler, a customised Dynamically Focused (DF) sidescan sonar system provides five times more resolution than traditional systems used on other... (read more)
2007-04-27 09:06:42

Pipeline Survey with Acoustics

Directional Sub-bottom Profiler and Hydrophone Array
A method is presented which greatly increases the efficiency of pipeline survey using sediment echo sounder. These surveys are mostly done sailing cross courses; adding receiving directionality, a course can be sailed along the pipeline. This means 100% inspection of pipe coverage can be obtained in far less time than that required for cross-sailing survey. The receiving element is an array of sixteen hydrophones with optimal signal processing (Kalman filtering). The position and orientation of the transmitting transducer and receiving hydrophone array are also estimated, optimally using a Global Position System and a Motion Reference Unit. A sediment echo-sounder transducer... (read more)
2007-05-09 12:00:00

U.S. Navy Contract for Kongsberg Underwater Technology, Inc.

Kongsberg Maritime's USA subsidiary, Kongsberg Underwater Technology Inc., has received the first delivery order of US$2,132,109 USD for integrated Multi-beam Sonar Systems for the Navy. These systems include deep water multi-beam echo sounders, multi-frequency single beam echo sounders, deep water sub-bottom profilers and acoustic doppler current profilers. The systems are for permanent installation aboard the six T-AGS 60 class survey vessels operated by the US Naval Oceanographic Office (NAVOCEANO). The contract is for performance over a five year period and if all options are exercised will continue until February 2011 with an estimated total value of US$29,545,558 USD. The contract... (read more)
2006-04-19 12:00:00

Ice Studies in Alaska's Cook Inlet for an LNG Terminal

ASL Environmental Sciences, Canada, has secured a contract for a 3-year metocean-ice study programme in Cook Inlet, Alaska for the proposed Alaska LNG Project terminal site. This turnkey metocean programme includes programme management, a protected species observer (PSO) vessel, HSE lead, data processing and analysis, and engineering input. During the summer and autumn of 2014, ASL deployed 3 Ice Profiler/ADCP moorings close to Nikiski, Alaska, on the Kenai Peninsula. Each mooring consisted of an Ice Profiler, ADCP, CT, and OBS Turbidity and was mounted in ASL’s own designed bottom frame or a taut-line mooring. An additional 8 ADCP moorings have... (read more)
2015-01-15 08:39:00
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