North Atlantic Steamship Travel at the Fin De Siecle
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Winds, Waves, and Bubbles at the Air-Sea Boundary
JEFFREY L. HANSON WINDS, WAVES, AND BUBBLES AT THE AIR-SEA BOUNDARY Subsurface bubbles are now recognized as a dominant acoustic scattering and reverberation mechanism in the upper ocean. A better understanding of the complex mechanisms responsible for subsurface bubbles should lead to an improved prediction capability for underwater sonar. The Applied Physics Laboratory recently conducted a unique experiment to investigate which air-sea descriptors are most important for subsurface bubbles and acoustic scatter. Initial analyses indicate that wind-history variables provide better predictors of subsurface bubble-cloud development than do wave-breaking estimates. The results suggest that a close coupling exists between the wind field and the upper-ocean mixing processes, such as Langmuir circulation, that distribute and organize the bubble populations. INTRODUCTION A multiyear series of experiments, conducted under the that, in the Gulf of Alaska wintertime environment, the auspices of the Navy-sponsored acoustic program, Crit amount of wave-breaking activity may not be an ideal ical Sea Test (CST), I has been under way since 1986 with indicator of deep bubble-cloud formation. Instead, the the charter to investigate environmental, scientific, and penetration of bubbles is more closely tied to short-term technical issues related to the performance of low-fre wind fluctuations, suggesting a close coupling between quency (100-1000 Hz) active acoustics. One key aspect the wind field and upper-ocean mixing processes that of CST is the investigation of acoustic backscatter and distribute and organize the bubble populations within the reverberation from upper-ocean features such as surface mixed layer. waves and bubble clouds. -
Wetsuits Raises the Bar Once Again, in Both Design and Technological Advances
Orca evokes the instinct and prowess of the powerful ruler of the seas. Like the Orca whale, our designs have always been organic, streamlined and in tune with nature. Our latest 2016 collection of wetsuits raises the bar once again, in both design and technological advances. With never before seen 0.88Free technology used on the Alpha, and the ultimate swim assistance WETSUITS provided by the Predator, to a more gender specific 3.8 to suit male and female needs, down to the latest evolution of the ever popular S-series entry-level wetsuit, Orca once again has something to suit every triathlete’s needs when it comes to the swim. 10 11 TRIATHLON Orca know triathletes and we’ve been helping them to conquer the WETSUITS seven seas now for more than twenty years.Our latest collection of wetsuits reflects this legacy of knowledge and offers something for RANGE every level and style of swimmer. Whether you’re a good swimmer looking for ultimate flexibility, a struggling swimmer who needs all the buoyancy they can get, or a weekend warrior just starting out, Orca has you covered. OPENWATER Swimming in the openwater is something that has always drawn those types of swimmers that find that the largest pool is too small for them. However open water swimming is not without it’s own challenges and Orca’s Openwater collection is designed to offer visibility, and so security, to those who want to take on this sport. 016 SWIMRUN The SwimRun endurance race is a growing sport and the wetsuit requirements for these competitors are unique. -
Fusion System Components
A Step Change in Military Autonomous Technology Introduction Commercial vs Military AUV operations Typical Military Operation (Man-Portable Class) Fusion System Components User Interface (HMI) Modes of Operation Typical Commercial vs Military AUV (UUV) operations (generalisation) Military Commercial • Intelligence gathering, area survey, reconnaissance, battlespace preparation • Long distance eg pipeline routes, pipeline surveys • Mine countermeasures (MCM), ASW, threat / UXO location and identification • Large areas eg seabed surveys / bathy • Less data, desire for in-mission target recognition and mission adjustment • Large amount of data collected for post-mission analysis • Desire for “hover” ability but often use COTS AUV or adaptations for specific • Predominantly torpedo shaped, require motion to manoeuvre tasks, including hull inspection, payload deployment, sacrificial vehicle • Errors or delays cost money • Errors or delays increase risk • Typical categories: man-portable, lightweight, heavy weight & large vehicle Image courtesy of Subsea Engineering Associates Typical Current Military Operation (Man-Portable Class) Assets Equipment Cost • Survey areas of interest using AUV & identify targets of interest: AUV & Operating Team USD 250k to USD millions • Deploy ROV to perform detailed survey of identified targets: ROV & Operating Team USD 200k to USD 450k • Deploy divers to deal with targets: Dive Team with Nav Aids & USD 25k – USD 100ks Diver Propulsion --------------------------------------------------------------------------------- -
Low-Frequency Active Towed Sonar
LOW-FREQUENCY ACTIVE TOWED SONAR Full-feature, long-range, low-frequency active and passive variable depth sonar (VDS) The Low-Frequency Active Sonar (LFATS) system is used on ships to detect, track and engage all types of submarines. L3Harris specifically designed the system to perform at a lower operating frequency against modern diesel-electric submarine threats. FEATURES > Compact size - LFATS is a small, > Full 360° coverage - a dual parallel array lightweight, air-transportable, ruggedized configuration and advanced signal system processing achieve instantaneous, > Specifically designed for easy unambiguous left/right target installation on small vessels. discrimination. > Configurable - LFATS can operate in a > Space-saving transmitter tow-body stand-alone configuration or be easily configuration - innovative technology integrated into the ship’s combat system. achieves omnidirectional, large aperture acoustic performance in a compact, > Tactical bistatic and multistatic capability sleek tow-body assembly. - a robust infrastructure permits interoperability with the HELRAS > Reverberation suppression - the unique helicopter dipping sonar and all key transmitter design enables forward, aft, sonobuoys. port and starboard directional LFATS has been successfully deployed on transmission. This capability diverts ships as small as 100 tons. > Highly maneuverable - own-ship noise energy concentration away from reduction processing algorithms, coupled shorelines and landmasses, minimizing with compact twin-line receivers, enable reverb and optimizing target detection. short-scope towing for efficient maneuvering, fast deployment and > Sonar performance prediction - a unencumbered operation in shallow key ingredient to mission planning, water. LFATS computes and displays system detection capability based on modeled > Compact Winch and Handling System or measured environmental data. - an ultrastable structure assures safe, reliable operation in heavy seas and permits manual or console-controlled deployment, retrieval and depth- keeping. -
Camoflauge Discography Torrent Download Link Camoflauge Discography Torrent Download Link
camoflauge discography torrent download link Camoflauge discography torrent download link. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. Cloudflare Ray ID: 67e2b2492cde4eaa • Your IP : 188.246.226.140 • Performance & security by Cloudflare. Camoflauge discography torrent download link. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What can I do to prevent this in the future? If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Another way to prevent getting this page in the future is to use Privacy Pass. You may need to download version 2.0 now from the Chrome Web Store. Cloudflare Ray ID: 67e2b2497b090621 • Your IP : 188.246.226.140 • Performance & security by Cloudflare. -
Sonar for Environmental Monitoring of Marine Renewable Energy Technologies
Sonar for environmental monitoring of marine renewable energy technologies FRANCISCO GEMO ALBINO FRANCISCO UURIE 350-16L ISSN 0349-8352 Division of Electricity Department of Engineering Sciences Licentiate Thesis Uppsala, 2016 Abstract Human exploration of the world oceans is ever increasing as conventional in- dustries grow and new industries emerge. A new emerging and fast-growing industry is the marine renewable energy. The last decades have been charac- terized by an accentuated development rate of technologies that can convert the energy contained in stream flows, waves, wind and tides. This growth ben- efits from the fact that society has become notably aware of the well-being of the environment we all live in. This brings a human desire to implement tech- nologies which cope better with the natural environment. Yet, this environ- mental awareness may also pose difficulties in approving new renewable en- ergy projects such as offshore wind, wave and tidal energy farms. Lessons that have been learned is that lack of consistent environmental data can become an impasse when consenting permits for testing and deployments marine renew- able energy technologies. An example is the European Union in which a ma- jority of the member states requires rigorous environmental monitoring pro- grams to be in place when marine renewable energy technologies are commis- sioned and decommissioned. To satisfy such high demands and to simultane- ously boost the marine renewable sector, long-term environmental monitoring framework that gathers multi-variable data are needed to keep providing data to technology developers, operators as well as to the general public. Technol- ogies based on active acoustics might be the most advanced tools to monitor the subsea environment around marine manmade structures especially in murky and deep waters where divining and conventional technologies are both costly and risky. -
Redacted for Privacy Abstract Approved: John V
AN ABSTRACT OF THE THESIS OF MIAH ALLAN BEAL for the Doctor of Philosophy (Name) (Degree) in Oceanography presented on August 12.1968 (Major) (Date) Title:Batymety and_Strictuof_thp..4rctic_Ocean Redacted for Privacy Abstract approved: John V. The history of the explordtion of the Central Arctic Ocean is reviewed.It has been only within the last 15 years that any signifi- cant number of depth-sounding data have been collected.The present study uses seven million echo soundings collected by U. S. Navy nuclear submarines along nearly 40, 000 km of track to construct, for the first time, a reasonably complete picture of the physiography of the basin of the Arctic Ocean.The use of nuclear submarines as under-ice survey ships is discussed. The physiography of the entire Arctic basin and of each of the major features in the basin are described, illustrated and named. The dominant ocean floor features are three mountain ranges, generally paralleling each other and the 40°E. 140°W. meridian. From the Pacific- side of the Arctic basin toward the Atlantic, they are: The Alpha Cordillera; The Lomonosov Ridge; andThe Nansen Cordillera. The Alpha Cordillera is the widest of the three mountain ranges. It abuts the continental slopes off the Canadian Archipelago and off Asia across more than550of longitude on each slope.Its minimum width of about 300 km is located midway between North America and Asia.In cross section, the Alpha Cordillera is a broad arch rising about two km, above the floor of the basin.The arch is marked by volcanoes and regions of "high fractured plateau, and by scarps500to 1000 meters high.The small number of data from seismology, heat flow, magnetics and gravity studies are reviewed.The Alpha Cordillera is interpreted to be an inactive mid-ocean ridge which has undergone some subsidence. -
Doppler Sonar Current Indicator 8
DOPPLER SONAR CURRENT INDICATOR 8 Model High-performance current indicator displays accurate speed and current data at five depth layers on a 10.4" color TFT or virtually any VGA monitor utilizing a Black Box system www.furuno.com Obtain highly accurate water current measurements using FURUNO’s reliable acoustic technology. The FURUNO CI-68 is a Doppler Sonar Current The absolute movements of tide Indicator designed for various types of fish and measuring layers are displayed in colors. hydrographic survey vessels. The CI-68 displays tide speed and direction at five depth layers and ship’s speed on a high defi- nition 10.4” color LCD. Using this information, you can predict net shape and plan when to throw your net. Tide vector for Layer 1 The CI-68 has a triple-beam emission system for providing highly accurate current measurement. This system greatly reduces the effects of the Tide vector for Layer 2 rolling, pitching and heaving motions, providing a continuous display of tide information. When ground (bottom) reference is not available Tide vector for Layer 3 acoustically in deep water, the CI-68 can provide true tide current information by receiving position and speed data from a GPS navigator and head- ing data from the satellite (GPS) compass SC- 50/110 or gyrocompass. In addition, navigation Tide vector for Layer 4 information, including position, course and ship ’s track, can also be displayed The CI-68 consists of a display unit, processor Tide vector for Layer 5 unit and transducer. The control unit and display unit can be installed separately for flexible instal- lation. -
Transducers Recommended by Garmin
TRANSDUCER SELECTION 2021 GUIDE CHOOSING THE RIGHT TRANSDUCER PANOPTIX LIVESCOPE™ There are several types of sonar available, each with special capabilities. And each requires a different transducer to work most effectively. For optimum performance, it is very important to match the transducer to your device’s sonar. To start, make sure the transducer you are buying pairs with your unit, and determine what type of sonar technology you would like to add. Read through each section to learn more about the sonar technologies and transducers recommended by Garmin. Our award-winning Panoptix LiveScope sonar brings real-time scanning sonar to life. It shows highly detailed, easy-to-interpret live scanning sonar images of structure, bait and fish swimming below and around your boat in real time, even when your boat SONAR TECHNOLOGY // PAGE 3 ADDITIONAL TRANSDUCERS // PAGE 24 is stationary. • Panoptix Livescope™ • Transom Mount Full capabilities are available with the Panoptix LiveScope • Panoptix Livescope™ Perspective • Thru-hull Traditional System (see below). The Panoptix LiveScope™ LVS12 transducer ® Mode Mount provides an economical solution for your GPSMAP 8600xsv • Thru-hull CHIRP Traditional chartplotter — without the need for a black box -- with 30-degree • Panoptix™ All-seeing Sonar • In-hull 2018 forward and 30-degree down real-time scanning sonar views. • Scanning Sonar System: UHD • Pocket Mount Part no: 010-02143-00 LVS12 • Scanning Sonar System: CHIRP Sonar THREE MODES IN ONE TRANSDUCER ACCESSORIES AND SENSORS // PAGE 32 THE RIGHT MOUNTING // PAGE 10 PANOPTIX LIVESCOPE™ DOWN • Accessories • In-hull Mount • Smart Sensors • Kayak In-hull • NMEA 2000® • Trolling Motor Mount • Transom Mount • Thru-hull Mount Live, easy-to-interpret scanning sonar images of structure and swimming fish in incredible detail below your Panoptix LiveScope LVS12 Down GARMIN TRANSDUCERS // PAGE 12 boat — up to 200’. -
Effects of Ocean Thermocline Variability on Noncoherent Underwater Acoustic Communications
Portland State University PDXScholar Electrical and Computer Engineering Faculty Electrical and Computer Engineering Publications and Presentations 4-2007 Effects of Ocean Thermocline Variability on Noncoherent Underwater Acoustic Communications Martin Siderius Portland State University, [email protected] Michael B. Porter HLS Research Corporation Paul Hursky HLS Research Corporation Vincent McDonald HLS Research Corporation Let us know how access to this document benefits ouy . Follow this and additional works at: http://pdxscholar.library.pdx.edu/ece_fac Part of the Electrical and Computer Engineering Commons Citation Details Siderius, M., Porter, M. B., Hursky, P., & McDonald, V. (2007). Effects of ocean thermocline variability on noncoherent underwater acoustic communications. Journal of The Acoustical Society of America, 121(4), 1895-1908. This Article is brought to you for free and open access. It has been accepted for inclusion in Electrical and Computer Engineering Faculty Publications and Presentations by an authorized administrator of PDXScholar. For more information, please contact [email protected]. Effects of ocean thermocline variability on noncoherent underwater acoustic communications ͒ Martin Siderius,a Michael B. Porter, Paul Hursky, Vincent McDonald, and the KauaiEx Group HLS Research Corporation, 12730 High Bluff Drive, San Diego, California 92130 ͑Received 16 December 2005; revised 14 December 2006; accepted 30 December 2006͒ The performance of acoustic modems in the ocean is strongly affected by the ocean environment. A storm can drive up the ambient noise levels, eliminate a thermocline by wind mixing, and whip up violent waves and thereby break up the acoustic mirror formed by the ocean surface. The combined effects of these and other processes on modem performance are not well understood. -
Table Is Set for ICC's Irish Festival
June 2013 Boston’s hometown VOL. 24 #6 journal of Irish culture. $1.50 Worldwide at All contents copyright © 2013 Boston Neighborhood News, Inc. bostonirish.com Atlantic Steps, which takes the stage on the final day of the Boston Irish Festival, showcases the story of Irish dance. Table is set for ICC’s Irish Festival By Sean Smith competitions, an Irish bread An Coimisiun, North American its sometimes gritty, sometimes among the cast of Atlantic Special to the BiR baking contest, children and Feis Commission and NAFC saucy, sometimes angry, always Steps, an international-touring Performances by Eileen Ivers family amusements, genealogy New England Region President loud’n proud version of Irish adaptation by Brian Cunning- & Immigrant Soul, Black 47, consultations, and appearances Pat Watkins. rock, flavored with folk as well ham of the Irish show “Fuaim and Atlantic Steps highlight by authors of books related to Kicking off the festival on as reggae, jazz, and hip-hop to Chonamara,” which chronicles this year’s Boston Irish Festival, Irish and Irish-American his- Friday evening, June 7, at 8 create an unabashed working- the story of sean-nos, Ireland’s which will take place June 7-9 tory, culture and literature. o’clock, will be Grammy win- class urban sound. Fronted by oldest dance form, portrayed at the Irish Cultural Centre of This year also will see the ner and nine-time all-Ireland lead singer, writer and guid- through the music, song, dance, New England in Canton. inaugural Boston Irish Festival fiddle champion Eileen Ivers, ing spirit Larry Kirwan, their and energy of the Connemara The traditional fiddle-accordi- Feis, a partnership with Liam whose resume includes appear- songs explore the social and region. -
Bottom Line Inside Happy Mother’S Day! 021 •
NEWS Local news and entertainment since 1969 Bottom Line A look at the color Happy Mother’s Day! Inside and sights of local GREATER LAS CRUCES CHAMBER OF COMMERCE • MAY 2021 • WWW.LASCRUCES.ORG TABLE OF CONTENTS A year like no other From the GLCC President premier of “Walking By BRANDI MISQUEZ It’s Mother’s Day..............................2 The pressures of main- A Mom’s 10 Rules for taining a household during the future workforce .......................3 a pandemic are intense on their own. 2020 brought 2021 Annual Chamber additional pressures to Gala Winners ................................4-5 millions of households with parents being tasked with Herb.” to uphold their own work 2021 Annual Chamber responsibilities, while Awards Video ................................6 also ensuring their kids are learning effectively. 2021 LCHBA Parents wanting to instill Casa for a Cause .............................7 some sense of normalcy into their kids’ lives while page 3 New/rewewing upholding these tasks can members ........................................8 simply be summed up by FRIDAY, one word for me: balance. It’s clear that being a par- COURTESY PHOTO MAY ent during COVID-19 times The pandemic changed everything for families like that of Brandi Misquez and Matthew Arguello. GREATER LAS CRUCES has not been an easy feat. 7, 2021 CHAMBER OF COMMERCE From my perspective, this for their virtual school- the Greater Las Cruces walls. It’s been both terrible I Volume 53, Number 19 150 E. LOHMAN AVE. has awarded us a unique ing once the quarantine Chamber of Commerce. and amazing all at the same LAS CRUCES, NM 88001 challenge mixed with a phase was lifted.