Sea Technology

JUL 2013

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

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SEATECHNOLOGY ® The Worldwide Information Leader for Marine Business, Science & Engineering JULY 2013, Volume 54, No. 7 Visit our website at www.sea-technology.com for online versions of feature articles and news departments. The editorial staff can be contacted at oceanbiz@sea-technology.com. SYSTEMS 10 ENVIRONMENTAL REGULATIONS SPARK POWER SAVINGS, RELIABILITY AND SAFETY Alex Bynum (Saft) describes how hybrid propulsion combines gas turbine energy and electric motors for more effcient battery power. 15 APPLICATION-SPECIFIC HMPE SYNTHETIC ROPE Bill Putnam (Yale Cordage) explains the role of the Unitrex XS Max Wear rope in lowering regional scale nodes deep into the Pacifc for the Ocean Observatories Initiative. 17 PRECISION ELECTRO-OPTOMECHANICAL CABLE ASSEMBLY FOR A TOWED ARRAY Amy Brown (BIRNS Inc.), Michael Einhorn and Carl Stevens (Einhorn Engineering PLLC) characterize an electro-optomechanical project, including a new deep submergence hybrid connector pair. Acoustic Communication, Positioning & Networking 21 LITHIUM-ION SUBSEA BATTERY SYSTEM Leon Adams and David White (SouthWest Electronic Energy) outline how SeaSafe Modules and BMS are pressure-tolerant and reliable to 6,000 meters. FIND YOUR ASSETS 24 HYDRODYNAMIC ANALYSIS OF A DRAG-TYPE WATER TURBINE Wenlong Tian and Baowei Song (Northwestern Polytechnical University) discuss how confguration with retractable blades increases power effciency. • Ultra Short Base Line (USBL) Positioning 29 ABYSS AUV IN SEAFLOOR VOLCANO STUDY Graham Lester (Hydroid Europe) compares bathymetry collected at higher resolution with surface-ship readings. • Long Base Line (LBL) Positioning 33 ACOUSTIC TOMOGRAPHY WITH AN UNDERWATER SENSOR NETWORK Andrew Goodney and Young H. Cho (University of Southern California's Information Sciences Institute) explain custom acoustic signals carrying low-bandwidth data. GET YOUR DATA 39 AUTONOMOUS AUV NAVIGATION IN A PARTIALLY KNOWN ENVIRONMENT Ji-Hong Li (KIRO) explores how P-SURO detects obstacles and moves autonomously in a water tank. 43 ST50 TIME LINE: 1987-1990 As Sea Technology magazine celebrates its 50th year, we look back on major events in the oceanographic industry and the world. For more information on these news items, visit our website at www.sea-technology.com. Editorial.......................................................7 Soundings ...................................................9 Capital Report ...........................................47 International ..............................................48 Ocean Business .........................................50 Product Development ...............................52 Offshore Oil & Ocean Engineering ............54 Navy Currents ...........................................55 Environmental Monitoring .........................56 Marine Electronics.....................................57 Marine Resources ......................................59 Marine Renewables ...................................60 Ocean Research ........................................61 Meetings ...................................................63 Contracts ...................................................64 People .......................................................65 ST Looks Back ...........................................66 Professional Services Directory..................67 Soapbox ....................................................69 Advertiser Index ........................................70 that Deliver • Modems — Reliable telemetry to 6km range — Advanced Data Logger Capabilities — Integrated or Remote Transducer Options — Enhanced Options Available RELY ON COVER— Launch of an iXBlue (Marly Le Roi, France) SAMS-DT6000 Multipurpose Synthetic Aperture Mapping Sonar from COMEX SA's (Marseille, France) RV Minibex offshore La Ciotat, France, in February 2013. This was the frst sea trial of the SAMS-DT6000 before delivery to Hyundai Heavy Industries Co. Ltd. (Ulsan, South Korea). NEXT MONTH— SPAN (synchronized position attitude navigation) with a MEMS IMU ... ICZM and MSP in the Adriatic Sea region ... Coastal planning, including offshore renewables ... Impacts of atmospheric stability on wind resource estimates off North Carolina ... Repair of VENUS segment in Straight of Georgia ... Conference previews: SEG 2013 and Oceans '13 San Diego. ©Copyright 2013 by Compass Publications, Inc. Sea Technology (ISSN 0093-3651) is published monthly by Compass Publications, Inc., Suite 1010, 1600 Wilson Blvd., Arlington, VA 22209; (703) 524-3136; FAX (703) 841-0852. All rights reserved. Neither this publication nor any part of it may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of Compass Publications Inc. Periodicals postage paid at Arlington, Virginia, and additional mailing offces. Subscriptions may be purchased at the following rates: domestic, $60 one year; $80 two years; foreign air mail, $120. Single copies $4.50 plus shipping and handling (current issue only). POSTMASTER: send address changes to Compass Publications, Inc., P.O. Box 600, Deer Isle, ME 04627-0600. Canada Publications Number 41450540. Canadian return address MSI Worldwide Mail, P.O. Box 2600, Mississauga, ON L4T 0A8, Canada. CUSTOMER SERVICE, Joy Carter, Tel. 1-800-989-5253 or 1-207-348-1057. www.sea-technology.com See us at AUVSI 2013, Booth 3913 www.benthos.com July 2013 / st 5

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