Sea Technology

SEP 2017

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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www.sea-technology.com September 2017 / st 49 www.geospace.com Manufacturing Cables That Meet Your Requirements For Over 30 Years 7007 Pinemont Houston, TX 77040 USA 713.986.4477 NEED CABLE? beam combination enables scanning the levee structure for integrity above and below the water line simultane- ously. Since 1900, there have been more than 160 levee failures in the Sacramento-San Joaquin River Delta. Wide-Ranging Inventory For Search Needs Commercial dive companies, law enforcement, search and rescue dive teams, and wreck hunters all rely upon a carefully chosen inventory of highly technical equipment to accomplish their goals. JW Fishers Mfg. special- izes in the manufacture of a diverse line of underwater search equipment to provide operators with a one-stop shop for their search needs. Among the inventory are JW Fishers' hand- held underwater metal detectors that can locate all metals. A diver using this equipment can detect any buried ob- ject. Boat-towed metal detectors allow the operator to search large areas in a short amount of time. ROVs can be used to capture and record video foot- age underwater. Sonar systems such as side scan sonar and sector-scanning sonar image the ocean floor, even in black water. When searching primar- ily for ferrous objects (iron and steel), a magnetometer has a greater detec- tion envelope over a traditional metal detector. Pingers and receivers provide the ability to mark and relocate under- water sites with ease. Wave Glider Hot Spot Serves as Communication Hub The Liquid Robotics Wave Glid- er Hot Spot system comprises sev- eral wireless modems that serve as a communication hub between AUVs, seafloor instrument packages and in- struments onshore. This facilitates the transfer of information more quickly and less expensively than traditional methods. So far, the Hot Spot has been used in several projects. It provided acous- tic communication support to the Coordinated Canyon Experiment for timely characterization of eight turbid- ity events, as well for making remote repairs to the deployed software. The Hot Spot provided acoustic commu- nication and geolocation support to the Benthic Rover (part of Ken Smith's Pelagic Benthic Carbon Coupling proj- ect). The Hot Spot was also used during the 2016 spring CANON campaign to allow scientists aboard the RV Rachel Carson to monitor a coastal profiling float and take water samples from the same volume of water. Teledyne Impulse Deepens University Relationship Teledyne Impulse-PDM Ltd., based in Alton, Hampshire, England, has fos- tered a long relationship with the Uni- versity of Portsmouth, centering on a Knowledge Transfer Partnership to gain insights into the performance of their underwater cable connector assem- blies. The relationship now continues in a Ph.D. studentship: Jamila Joseph works part-time on her thesis research while working full-time at the com- pany. Teledyne covers Joseph's tuition. Joseph's research focuses on charac- terizing and optimizing innovative PU systems that do not use mercury compounds as catalysts as a protective coating. Mercury-free PU alternatives such as tin, amines and others, as re- quired under the EC REACH directive, are being investigated with a focus on material optimization and accelerated exposure testing in this research. ST

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