2nd draft
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@ -192,13 +192,14 @@
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|||||||
year = {2010}
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year = {2010}
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||||||
}
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}
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||||||
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@misc{rov-manual,
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@Misc{rov-manual,
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||||||
author = {{Marine Technology Society ROV Committe}},
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author = {{Marine Technology Society ROV Committe}},
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||||||
groups = {ROV},
|
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||||||
howpublished = {Online},
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howpublished = {Online},
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||||||
title = {Operational Effectiveness of Unmanned Underwater Systems},
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title = {Operational Effectiveness of Unmanned Underwater Systems},
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||||||
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year = {1998},
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||||||
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groups = {ROV},
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||||||
url = {https://rov.org/wp-content/uploads/2020/06/manual.pdf},
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url = {https://rov.org/wp-content/uploads/2020/06/manual.pdf},
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||||||
urldate = {2020-12-16}
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urldate = {2020-12-16},
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}
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}
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||||||
|
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@Misc{noaa-depth,
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@Misc{noaa-depth,
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@ -919,6 +920,183 @@ Li metal has been attracting increasing attention as an anode in all-solid-state
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urldate = {2021-1-2},
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urldate = {2021-1-2},
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}
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}
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||||||
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@Misc{whats-an-auv,
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author = {NOAA},
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howpublished = {Online},
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month = sep,
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title = {What is the difference between an AUV and an ROV?},
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year = {2020},
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groups = {AUV},
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url = {https://oceanservice.noaa.gov/facts/auv-rov.html},
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urldate = {2021-1-3},
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}
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@Misc{what-is-an-rov,
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author = {BlueRobotics},
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howpublished = {Online},
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month = sep,
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||||||
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title = {What is an Underwater ROV?},
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||||||
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year = {2019},
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||||||
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groups = {ROV},
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||||||
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url = {https://bluerobotics.com/learn/what-is-an-rov/},
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urldate = {2021-1-3},
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}
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@Misc{wired-cable-repair-ops,
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author = {Matt Burgess},
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howpublished = {Online},
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month = nov,
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title = {Ever wondered how underwater cables are laid? We take a trip on the ship that keeps us online},
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year = {2016},
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groups = {ROV},
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url = {https://www.wired.co.uk/article/subsea-internet-cable-ship-boat},
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urldate = {2021-1-3},
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}
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@Misc{noaa-what-are-auvs-and-why,
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author = {Denise Crimmins and Justin Manley},
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howpublished = {Online},
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title = {What Are AUVs, and Why Do We Use Them?},
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year = {2008},
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groups = {AUV},
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organization = {NOAA},
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url = {https://oceanexplorer.noaa.gov/explorations/08auvfest/background/auvs/auvs.html},
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urldate = {2021-1-3},
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}
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@InProceedings{underwater-gps-problem,
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author = {G. {Taraldsen} and T. A. {Reinen} and T. {Berg}},
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booktitle = {OCEANS 2011 IEEE - Spain},
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title = {The underwater GPS problem},
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year = {2011},
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pages = {1-8},
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doi = {10.1109/Oceans-Spain.2011.6003649},
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groups = {Navigation},
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url = {https://ieeexplore.ieee.org/document/6003649},
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urldate = {2021-1-3},
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}
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@Misc{marine-insight-dead-reckoning,
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author = {Shilavadra Bhattacharjee},
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howpublished = {Online},
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month = oct,
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title = {What is Dead Reckoning Navigation Technique at Sea?},
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year = {2019},
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groups = {Navigation},
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organization = {Marine Insight},
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url = {https://www.marineinsight.com/marine-navigation/what-is-dead-reckoning-navigation-technique-at-sea/},
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urldate = {2021-1-3},
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}
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@Article{aviation-dead-reckoning,
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author = {Gebre-Egziabher, Demoz and Powell, J.D. and Enge, P},
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title = {Design and Performance Analysis of a Low-Cost Aided Dead Reckoning Navigator},
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year = {2010},
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month = {07},
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groups = {Navigation},
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url = {https://www.researchgate.net/publication/228696978_Design_and_Performance_Analysis_of_a_Low-Cost_Aided_Dead_Reckoning_Navigator},
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urldate = {2021-1-3},
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}
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@InCollection{kalman-filter-intro,
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author = {Youngjoo Kim and Hyochoong Bang},
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booktitle = {Introduction and Implementations of the Kalman Filter},
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publisher = {IntechOpen},
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title = {Introduction to Kalman Filter and Its Applications},
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year = {2019},
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address = {Rijeka},
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chapter = {2},
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editor = {Felix Govaers},
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doi = {10.5772/intechopen.80600},
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groups = {AUV, Navigation},
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url = {https://doi.org/10.5772/intechopen.80600},
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urldate = {2021-1-3},
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}
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@Article{kalman-filter-paper,
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author = {Kalman, Rudolph Emil},
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journal = {Transactions of the ASME--Journal of Basic Engineering},
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title = {A New Approach to Linear Filtering and Prediction Problems},
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year = {1960},
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number = {Series D},
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pages = {35--45},
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volume = {82},
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groups = {AUV, Navigation},
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url = {https://www.cs.unc.edu/~welch/kalman/media/pdf/Kalman1960.pdf},
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urldate = {2021-1-3},
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}
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@InProceedings{acoustic-positioning-overview,
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author = {Keith Vickery},
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booktitle = {Dynamic Positioning Conference},
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title = {Acoustic Positioning Systems: A Practical Overview of Current Systems},
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year = {1998},
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month = oct,
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groups = {Navigation},
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url = {https://dynamic-positioning.com/proceedings/dp1998/SVickery.PDF},
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urldate = {2021-1-3},
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}
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@Article{usbl-aup,
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author = {Cho-Chung Liang},
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journal = {Marine Geodesy},
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title = {A Study of a Short-Baseline Acoustic Positioning System for Offshore Vessels},
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year = {1999},
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number = {1},
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pages = {19-30},
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volume = {22},
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doi = {10.1080/014904199273579},
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eprint = {https://doi.org/10.1080/014904199273579},
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groups = {Navigation},
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publisher = {Taylor & Francis},
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url = {https://doi.org/10.1080/014904199273579},
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urldate = {2021-1-3},
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}
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@PhdThesis{uan-italian-thesis,
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author = {Andrea De Vito},
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school = {University of Pisa},
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title = {An underwater acoustic positioning system based on buoys with GPS},
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year = {2007},
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groups = {ROV, Navigation},
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url = {https://core.ac.uk/download/pdf/14694283.pdf},
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urldate = {2021-1-3},
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}
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@Article{gib-diver,
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author = {Sgorbini, Sergio and Peirano, Andrea and Cocito, Silvia and Morgigni, Massimo},
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journal = {Enzyme and Microbial Technology - ENZYME MICROB TECHNOL},
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title = {An underwater tracking system for mapping marine communities: An application to Posidonia oceanica},
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year = {2002},
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month = {05},
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pages = {135-138},
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volume = {25},
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doi = {10.1016/S0399-1784(02)01188-X},
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groups = {Navigation},
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url = {https://www.researchgate.net/publication/251592155_An_underwater_tracking_system_for_mapping_marine_communities_An_application_to_Posidonia_oceanica},
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urldate = {2021-1-3},
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}
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@InProceedings{janus-uac,
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author = {J. {Potter} and J. {Alves} and D. {Green} and G. {Zappa} and I. {Nissen} and K. {McCoy}},
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booktitle = {2014 Underwater Communications and Networking (UComms)},
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title = {The JANUS underwater communications standard},
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year = {2014},
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pages = {1-4},
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doi = {10.1109/UComms.2014.7017134},
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groups = {Communications},
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url = {https://ieeexplore.ieee.org/document/7017134},
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urldate = {2021-1-3},
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}
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@Misc{ap-submarine-cable-map,
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author = {TeleGeography},
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howpublished = {Online},
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title = {Submarine Cable Map},
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url = {https://www.submarinecablemap.com/},
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urldate = {2021-1-3},
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}
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@Comment{jabref-meta: databaseType:bibtex;}
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@Comment{jabref-meta: databaseType:bibtex;}
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@Comment{jabref-meta: grouping:
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@Comment{jabref-meta: grouping:
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@ -930,5 +1108,5 @@ Li metal has been attracting increasing attention as an anode in all-solid-state
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2 StaticGroup:ROV\;0\;1\;0x8a8a8aff\;\;\;;
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2 StaticGroup:ROV\;0\;1\;0x8a8a8aff\;\;\;;
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2 StaticGroup:AUV\;0\;1\;0x8a8a8aff\;\;\;;
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2 StaticGroup:AUV\;0\;1\;0x8a8a8aff\;\;\;;
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1 StaticGroup:Renewables\;0\;1\;0x8a8a8aff\;\;\;;
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1 StaticGroup:Renewables\;0\;1\;0x8a8a8aff\;\;\;;
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1 StaticGroup:Battery\;0\;1\;0x8a8a8aff\;\;\;;
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1 StaticGroup:Battery\;0\;0\;0x8a8a8aff\;\;\;;
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}
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}
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@ -2375,6 +2375,7 @@ Figure?
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\end_inset
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\end_inset
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.
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.
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This will provide 2.44 MWh of electrical energy storage for the buffer system.
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\end_layout
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\end_layout
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\begin_layout Standard
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\begin_layout Standard
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@ -3644,8 +3645,8 @@ Summary
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\end_layout
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\end_layout
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\begin_layout Standard
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\begin_layout Standard
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The proposed buffer solution includes 193,600 NCM Lithium-ion cells requiring
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The proposed 2.44 MWh buffer solution includes 193,600 NCM Lithium-ion cells
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replacement every 2.3 years.
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requiring replacement every 2.3 years.
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As a result of this replacement rate, it is stipulated that the battery
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As a result of this replacement rate, it is stipulated that the battery
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be re-appropriated for second-use such as energy storage following decommission
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be re-appropriated for second-use such as energy storage following decommission
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in order to extend their life and reduce the environmental impact.
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in order to extend their life and reduce the environmental impact.
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@ -4065,13 +4066,30 @@ ROVs and AUVs
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UUVs can be divided into two categories based on their control scheme.
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UUVs can be divided into two categories based on their control scheme.
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Remotely operated underwater vehicles (ROV) and autonomous underwater vehicles
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Remotely operated underwater vehicles (ROV) and autonomous underwater vehicles
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(AUV) are distinguished by whether a human is controlling the vehicle or
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(AUV) are distinguished by whether a human is controlling the vehicle or
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whether it operates independently; as such they have different applications.
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whether it operates independently; as such they have different applications,
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\begin_inset CommandInset citation
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LatexCommand cite
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key "whats-an-auv"
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literal "false"
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\end_inset
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.
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ROVs have been the vehicle class of choice where complex intervention and
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ROVs have been the vehicle class of choice where complex intervention and
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actuation is required such as offshore oil and gas operations and cable
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actuation is required such as offshore oil and gas operations and cable
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repair.
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repair.
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A human operator controls the vehicle from the surface vessel; bi-directional
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A human operator controls the vehicle from the surface vessel; bi-directional
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communication including data, control, video and power are transmitted
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communication including data, control, video and power are transmitted
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through an umbilical cord tether between the two vessels.
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through an umbilical cord tether between the two vessels,
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\begin_inset CommandInset citation
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LatexCommand cite
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key "what-is-an-rov"
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literal "false"
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\end_inset
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.
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AUVs on the other hand have primarily been used for survey and research
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AUVs on the other hand have primarily been used for survey and research
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purposes.
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purposes.
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@ -4101,7 +4119,15 @@ Physical Configuration
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\begin_layout Standard
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\begin_layout Standard
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The physical layout of a UUV can generally be described by one of two classes,
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The physical layout of a UUV can generally be described by one of two classes,
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box frames or torpedo shaped.
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box frames or torpedo shaped,
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\begin_inset CommandInset citation
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LatexCommand cite
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key "rov-manual"
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literal "false"
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\end_inset
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.
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\begin_inset Flex TODO Note (Margin)
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\begin_inset Flex TODO Note (Margin)
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status open
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status open
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@ -4128,7 +4154,16 @@ Current ROV Usage
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Cable repair operations are currently undertaken, where possible, with human-con
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Cable repair operations are currently undertaken, where possible, with human-con
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trolled ROVs.
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trolled ROVs.
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With visual contact and direct actuation at the seabed, the ROV is used
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With visual contact and direct actuation at the seabed, the ROV is used
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to identify, cut and grip the cable for retrieval to the surface-vessel.
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to identify, cut and grip the cable for retrieval to the surface-vessel,
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\begin_inset CommandInset citation
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LatexCommand cite
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key "wired-cable-repair-ops"
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literal "false"
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\end_inset
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.
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In doing so the need for repeated motions of the ship across the cable
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In doing so the need for repeated motions of the ship across the cable
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is removed, saving time and fuel.
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is removed, saving time and fuel.
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Instead, the surface vessel uses dynamic positioning in order to maintain
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Instead, the surface vessel uses dynamic positioning in order to maintain
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@ -4138,7 +4173,15 @@ trolled ROVs.
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\begin_layout Standard
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\begin_layout Standard
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While this finer control is a key benefit for ROV use over grapnels, one
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While this finer control is a key benefit for ROV use over grapnels, one
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of the most important benefits is the ability to bury repaired cables in
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of the most important benefits is the ability to bury repaired cables in
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the sea floor using high-powered water jets.
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the sea floor using high-powered water jets,
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\begin_inset CommandInset citation
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LatexCommand cite
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key "smd-qtrencher-600-datasheet"
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literal "false"
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\end_inset
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.
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70% of cable damage is caused by man-made activity, of which over a third
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70% of cable damage is caused by man-made activity, of which over a third
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is a result of fishing activity; another quarter is as a result ship anchors,
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is a result of fishing activity; another quarter is as a result ship anchors,
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@ -4703,12 +4746,12 @@ noprefix "false"
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of about 3 km.
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of about 3 km.
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This poses a problem to cable repair operations where, further out to sea,
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This poses a problem to cable repair operations where, further out to sea,
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the sea floor can extend much further, see figure
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the sea floor can extend much further, see figure
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\begin_inset Flex TODO Note (Margin)
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\begin_inset CommandInset ref
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status open
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LatexCommand ref
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reference "fig:bathymetry-rov-range-estimation"
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\begin_layout Plain Layout
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plural "false"
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bathymetry chart?
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caps "false"
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\end_layout
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noprefix "false"
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\end_inset
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\end_inset
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@ -4726,6 +4769,58 @@ bathymetry chart?
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this operating range where burying the cable is less important.
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this operating range where burying the cable is less important.
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\end_layout
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\end_layout
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\begin_layout Standard
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\begin_inset Float figure
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wide false
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sideways false
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status open
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\begin_layout Plain Layout
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\noindent
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\align center
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\begin_inset Graphics
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filename rov range.png
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lyxscale 40
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width 60text%
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\end_inset
|
||||||
|
|
||||||
|
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Plain Layout
|
||||||
|
\begin_inset Caption Standard
|
||||||
|
|
||||||
|
\begin_layout Plain Layout
|
||||||
|
An estiamtion as to the operating range of the ROV, shaded red indicates
|
||||||
|
seabed outside of the operating area,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "noaa-depth-google,ap-submarine-cable-map"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
|
||||||
|
\begin_inset CommandInset label
|
||||||
|
LatexCommand label
|
||||||
|
name "fig:bathymetry-rov-range-estimation"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
|
||||||
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Paragraph
|
\begin_layout Paragraph
|
||||||
Requirements Specification
|
Requirements Specification
|
||||||
\end_layout
|
\end_layout
|
||||||
@ -4784,7 +4879,16 @@ Measurement of the depth of a body of water
|
|||||||
|
|
||||||
\end_inset
|
\end_inset
|
||||||
|
|
||||||
, surveys and chemical composition investigations such as pH and toxin levels.
|
, surveys and chemical composition investigations such as pH and toxin levels,
|
||||||
|
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "noaa-what-are-auvs-and-why"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Standard
|
\begin_layout Standard
|
||||||
@ -4847,7 +4951,7 @@ An advantage of using an autonomous vehicle would be the lack of need for
|
|||||||
This could reduce the required power directed to dynamic positioning which
|
This could reduce the required power directed to dynamic positioning which
|
||||||
in higher sea states can become a significant draw.
|
in higher sea states can become a significant draw.
|
||||||
Additionally, as the UUV can move independently, the surface vehicle would
|
Additionally, as the UUV can move independently, the surface vehicle would
|
||||||
not need to directly track the vehicles movement; for example, when the
|
not need to directly track the vehicle's movement; for example, when the
|
||||||
UUV is re-burying the repaired cable in shallower waters.
|
UUV is re-burying the repaired cable in shallower waters.
|
||||||
This would, again, lower the required propulsion power used by the surface
|
This would, again, lower the required propulsion power used by the surface
|
||||||
vessel.
|
vessel.
|
||||||
@ -4920,7 +5024,15 @@ Decoupling the vehicles introduces complications that are not necessarily
|
|||||||
typical to the existing use cases for AUVs.
|
typical to the existing use cases for AUVs.
|
||||||
The frequency of EM waves used by GNSS systems do not penetrate deep through
|
The frequency of EM waves used by GNSS systems do not penetrate deep through
|
||||||
the water and an AUV must be able to operate without world co-ordinates
|
the water and an AUV must be able to operate without world co-ordinates
|
||||||
provided in this manner.
|
provided in this manner,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "underwater-gps-problem"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
As such, navigation systems used by AUVs are typically
|
As such, navigation systems used by AUVs are typically
|
||||||
\emph on
|
\emph on
|
||||||
dead reckoning
|
dead reckoning
|
||||||
@ -4928,7 +5040,15 @@ dead reckoning
|
|||||||
systems.
|
systems.
|
||||||
This is a form of navigation that operates relative to a known fixed point
|
This is a form of navigation that operates relative to a known fixed point
|
||||||
(where a UUV is deployed for example) as opposed to one relative to world
|
(where a UUV is deployed for example) as opposed to one relative to world
|
||||||
co-ordinates.
|
co-ordinates,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "marine-insight-dead-reckoning"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Standard
|
\begin_layout Standard
|
||||||
@ -4939,7 +5059,15 @@ With an accurate system, this will satisfy many surveying and research use
|
|||||||
navigate to a specific location (the cable fault).
|
navigate to a specific location (the cable fault).
|
||||||
A dead reckoning system as described above uses relative sensors to measure
|
A dead reckoning system as described above uses relative sensors to measure
|
||||||
speed and infer the current location however these relative sensors have
|
speed and infer the current location however these relative sensors have
|
||||||
associated measurement errors which accumulate over time.
|
associated measurement errors which accumulate over time,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "aviation-dead-reckoning"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
This would be more pronounced under the water where sea currents are liable
|
This would be more pronounced under the water where sea currents are liable
|
||||||
to accentuate these errors, the efficacy of an AUV's fault location capabilitie
|
to accentuate these errors, the efficacy of an AUV's fault location capabilitie
|
||||||
s may be reduced to the point of unacceptability.
|
s may be reduced to the point of unacceptability.
|
||||||
@ -5112,10 +5240,21 @@ literal "false"
|
|||||||
|
|
||||||
\end_inset
|
\end_inset
|
||||||
|
|
||||||
will be used.
|
will be implemented.
|
||||||
The vehicle will likely be at the larger and heavier end of existing ROVs
|
The vehicle will likely be at the larger and heavier end of existing ROVs
|
||||||
as the vehicle must now have the onboard energy capabilities to complete
|
as the vehicle must now have the onboard energy capabilities to complete
|
||||||
a mission without a constant power supply from the surface vessel.
|
a mission without a constant power supply from the surface vessel.
|
||||||
|
The vehicle is assumed to have similar dimensions to existing vehicles,
|
||||||
|
an estimation of 4m x 4m x 2m for a volume of 32m
|
||||||
|
\begin_inset script superscript
|
||||||
|
|
||||||
|
\begin_layout Plain Layout
|
||||||
|
3
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
is used as well as an estimation of 10 t for weight.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Subsubsection
|
\begin_layout Subsubsection
|
||||||
@ -5135,7 +5274,17 @@ return home
|
|||||||
orders.
|
orders.
|
||||||
When operating underwater, acoustic signals are the primary medium for
|
When operating underwater, acoustic signals are the primary medium for
|
||||||
wireless communication.
|
wireless communication.
|
||||||
|
JANUS is a NATO standard for underwater communications using modulated
|
||||||
|
audio signals, as such this protocol will be used between the two vessels,
|
||||||
|
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "janus-uac"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Subsubsection
|
\begin_layout Subsubsection
|
||||||
@ -5157,7 +5306,16 @@ dead reckoning
|
|||||||
\emph default
|
\emph default
|
||||||
using an inertial navigation system (INS).
|
using an inertial navigation system (INS).
|
||||||
An INS uses input from many types of sensor such as accelerometers and
|
An INS uses input from many types of sensor such as accelerometers and
|
||||||
gyroscopes to measure the movement of the vehicle and hence infer its location.
|
gyroscopes to measure the movement of the vehicle and hence infer its location,
|
||||||
|
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "nortek-subsea-navigation"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
None of these could individually provide an accurate determination of location
|
None of these could individually provide an accurate determination of location
|
||||||
and as such
|
and as such
|
||||||
\emph on
|
\emph on
|
||||||
@ -5172,13 +5330,11 @@ sensor fusion
|
|||||||
\emph on
|
\emph on
|
||||||
Kalman filter
|
Kalman filter
|
||||||
\emph default
|
\emph default
|
||||||
|
,
|
||||||
\begin_inset Flex TODO Note (Margin)
|
\begin_inset CommandInset citation
|
||||||
status open
|
LatexCommand cite
|
||||||
|
key "kalman-filter-paper,kalman-filter-intro"
|
||||||
\begin_layout Plain Layout
|
literal "false"
|
||||||
reference, explain?
|
|
||||||
\end_layout
|
|
||||||
|
|
||||||
\end_inset
|
\end_inset
|
||||||
|
|
||||||
@ -5224,13 +5380,29 @@ Alongside the use of acoustic signals for communications it will also be
|
|||||||
employed for positioning.
|
employed for positioning.
|
||||||
One application for this is underwater acoustic positioning which employs
|
One application for this is underwater acoustic positioning which employs
|
||||||
the use of time-of-flight measurements to beacons of a known location to
|
the use of time-of-flight measurements to beacons of a known location to
|
||||||
triangulate an object's location.
|
triangulate an object's location,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "acoustic-positioning-overview"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
There are different configurations for such a system depending on how these
|
There are different configurations for such a system depending on how these
|
||||||
beacons are laid out,
|
beacons are laid out,
|
||||||
\emph on
|
\emph on
|
||||||
long-baseline
|
long-baseline
|
||||||
\emph default
|
\emph default
|
||||||
(LBL) systems involve beacons located on the sea floor.
|
(LBL) systems involve beacons located on the sea floor,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "nortek-subsea-navigation"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
Spreading these beacons around the working area of an ROV widens the baseline
|
Spreading these beacons around the working area of an ROV widens the baseline
|
||||||
of the system and provides higher accuracy when triangulating.
|
of the system and provides higher accuracy when triangulating.
|
||||||
This configuration is best suited to static areas of research such as ship
|
This configuration is best suited to static areas of research such as ship
|
||||||
@ -5249,7 +5421,15 @@ Short-baseline
|
|||||||
\emph default
|
\emph default
|
||||||
(SBL) systems involve a number of beacons placed at the furthest corners
|
(SBL) systems involve a number of beacons placed at the furthest corners
|
||||||
of the surface vessel, this has the benefit of requiring little set-up
|
of the surface vessel, this has the benefit of requiring little set-up
|
||||||
and pack-down at the cost of reduced accuracy.
|
and pack-down at the cost of reduced accuracy,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "acoustic-positioning-overview,usbl-aup"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
Relative to the UUV these beacons are all on a similar bearing when operating
|
Relative to the UUV these beacons are all on a similar bearing when operating
|
||||||
at a distance, as a result changes in the vehicle's location would be reflected
|
at a distance, as a result changes in the vehicle's location would be reflected
|
||||||
in similar changes to the measurements from all of the beacons.
|
in similar changes to the measurements from all of the beacons.
|
||||||
@ -5282,7 +5462,15 @@ inverted long-baseline
|
|||||||
\emph on
|
\emph on
|
||||||
smart buoys
|
smart buoys
|
||||||
\emph default
|
\emph default
|
||||||
around the expected working area of the UUV.
|
around the expected working area of the UUV,
|
||||||
|
\begin_inset CommandInset citation
|
||||||
|
LatexCommand cite
|
||||||
|
key "uan-italian-thesis,gib-diver"
|
||||||
|
literal "false"
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
.
|
||||||
The use of buoys as opposed to beacons on the sea-floor significantly decreases
|
The use of buoys as opposed to beacons on the sea-floor significantly decreases
|
||||||
the preparation and clean-up mission phases.
|
the preparation and clean-up mission phases.
|
||||||
\end_layout
|
\end_layout
|
||||||
@ -5458,6 +5646,17 @@ The cell voltage (3.6 V) and capacity (3.5 Ah) were multiplied for 12.6 Wh
|
|||||||
The battery system constitutes an extra 5,700 kg of extra weight for the
|
The battery system constitutes an extra 5,700 kg of extra weight for the
|
||||||
UUV, it is important that the battery be removable for tethered operation
|
UUV, it is important that the battery be removable for tethered operation
|
||||||
in order to increase efficiency when independent operation is not required.
|
in order to increase efficiency when independent operation is not required.
|
||||||
|
This will bring the total weight of the vehicle to 16t when operating in
|
||||||
|
AUV mode and is estimated to take up 2.5 m
|
||||||
|
\begin_inset script superscript
|
||||||
|
|
||||||
|
\begin_layout Plain Layout
|
||||||
|
3
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\end_inset
|
||||||
|
|
||||||
|
of space.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Standard
|
\begin_layout Standard
|
||||||
@ -5757,7 +5956,7 @@ digitisation
|
|||||||
Digitisation describes the transforming of data or a process from an analogue
|
Digitisation describes the transforming of data or a process from an analogue
|
||||||
system to a digital one,
|
system to a digital one,
|
||||||
\begin_inset CommandInset citation
|
\begin_inset CommandInset citation
|
||||||
LatexCommand citep
|
LatexCommand cite
|
||||||
key "workingmouse-digitalisation"
|
key "workingmouse-digitalisation"
|
||||||
literal "false"
|
literal "false"
|
||||||
|
|
||||||
@ -5775,7 +5974,7 @@ literal "false"
|
|||||||
Digitalisation describes the use of digitisation to increase efficiency
|
Digitalisation describes the use of digitisation to increase efficiency
|
||||||
and access new value-producing business opportunities,
|
and access new value-producing business opportunities,
|
||||||
\begin_inset CommandInset citation
|
\begin_inset CommandInset citation
|
||||||
LatexCommand citep
|
LatexCommand cite
|
||||||
key "workingmouse-digitalisation,gartner-digitalization"
|
key "workingmouse-digitalisation,gartner-digitalization"
|
||||||
literal "false"
|
literal "false"
|
||||||
|
|
||||||
@ -5834,6 +6033,41 @@ Within the vessels, machine learning (ML) and AI will have varying applicability
|
|||||||
location.
|
location.
|
||||||
\end_layout
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Part
|
||||||
|
Design Summary
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Section
|
||||||
|
Vessel
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Subsection
|
||||||
|
Electrical Energy Storage
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Standard
|
||||||
|
The surface will be fitted with 2.44 MWh of electrical energy storage acting
|
||||||
|
as a buffer between the ammonia fuel cells and the thrusters.
|
||||||
|
This will allow the power from the ammonia cells to be generated in the
|
||||||
|
most efficient manner possible with this primarily being varied by changing
|
||||||
|
the population of active cells instead of the draw on a fixed group.
|
||||||
|
The system will be repurposed following decommission in order to extend
|
||||||
|
the life of the system and reduce the environmental impact.
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Subsection
|
||||||
|
Autonomous Underwater Vehicle Capabilities
|
||||||
|
\end_layout
|
||||||
|
|
||||||
|
\begin_layout Standard
|
||||||
|
The proposed UUV inherits the operating capabilities of existing ROVs used
|
||||||
|
in the domain while proposing extensions to allow autonomous operations.
|
||||||
|
This allows an increase in efficiency while decoupling the two vessels
|
||||||
|
in order to save fuel for the ship.
|
||||||
|
The UUV has 1.5 MWh of removable onboard power storage for autonomous missions
|
||||||
|
in order to allow a 20 hour operating time.
|
||||||
|
\end_layout
|
||||||
|
|
||||||
\begin_layout Standard
|
\begin_layout Standard
|
||||||
\begin_inset Newpage newpage
|
\begin_inset Newpage newpage
|
||||||
\end_inset
|
\end_inset
|
||||||
|
BIN
final report/rov range.png
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final report/rov range.png
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After Width: | Height: | Size: 483 KiB |
BIN
rov range.xcf
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rov range.xcf
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Loading…
Reference in New Issue
Block a user