Download or read book Unmanned Vehicle Systems Operations on Air Sea Land written by Randall Nichols and published by . This book was released on 2020-10-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned Vehicle Systems & Operations On Air, Sea, Land is our fourth textbook in a series covering the world of Unmanned Aircraft Systems (UAS) and Counter Unmanned Aircraft Systems (CUAS). (Nichols R. K., 2018) (Nichols R. K., et al., 2019) (Nichols R. , et al., 2020)The authors have expanded their purview beyond UAS / CUAS systems. Our title shows our concern for growth and unique cyber security unmanned vehicle technology and operations for unmanned vehicles in all theaters: Air, Sea and Land - especially maritime cybersecurity and China proliferation issues. Topics include: Information Advances, Remote ID, and Extreme Persistence ISR; Unmanned Aerial Vehicles & How They Can Augment Mesonet Weather Tower Data Collection; Tour de Drones for the Discerning Palate; Underwater Autonomous Navigation & other UUV Advances; Autonomous Maritime Asymmetric Systems; UUV Integrated Autonomous Missions & Drone Management; Principles of Naval Architecture Applied to UUV's; Unmanned Logistics Operating Safely and Efficiently Across Multiple Domains; Chinese Advances in Stealth UAV Penetration Path Planning in Combat Environment; UAS, the Fourth Amendment and Privacy; UV & Disinformation / Misinformation Channels; Chinese UAS Proliferation along New Silk Road Sea / Land Routes; Automaton, AI, Law, Ethics, Crossing the Machine - Human Barrier and Maritime Cybersecurity.Unmanned Vehicle Systems are an integral part of the US national critical infrastructure The authors have endeavored to bring a breadth and quality of information to the reader that is unparalleled in the unclassified sphere. Unmanned Vehicle (UV) Systems & Operations On Air, Sea, Land discusses state-of-the-art technology issues facing U.S. UV system researchers / designers / manufacturers / testers. We trust our newest look at Unmanned Vehicles in Air, Sea, and Land will enrich our students and readers understanding of the purview of this wonderful technology we call UV.

Download or read book Maritime Unmanned written by Ernest M Snowden and published by Naval Institute Press. This book was released on 2021-10-15 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maritime Unmanned recounts the promising beginning, demoralizing setbacks, and ultimate success of the visionaries who championed unmanned aircraft systems (UAS) technology for the U.S. Navy. Ernest Snowden and Robert F. Wood Jr. dive deep inside the machinations of aerospace and defense industry leadership, strategy development, and execution to describe the process by which the Air Force’s Global Hawk was adapted to become the Navy’s Triton. This was the first time in the history of naval aviation that an unmanned aerial vehicle was adopted into frontline squadron inventories to become an enabling component of the maritime patrol and reconnaissance mission, a process that took more than twenty years as industry representatives and Navy counterparts developed and socialized an unfamiliar and unconventional concept of operations and senior government acquisition officials either advocated or purposely road-blocked its advancement. —Military Writers Society of America Award: Bronze Medal

Download or read book Advances in Unmanned Marine Vehicles written by G.N. Roberts and published by IET. This book was released on 2006-01-31 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned marine vehicles (UMVs) include autonomous underwater vehicles, remotely operated vehicles, semi-submersibles and unmanned surface craft. Considerable importance is being placed on the design and development of such vehicles, as they provide cost-effective solutions to a number of littoral, coastal and offshore problems. This book highlights the advanced technology that is evolving to meet the challenges being posed in this exciting and growing area of research.

Download or read book Unmanned Systems of World Wars I and II written by H. R. Everett and published by MIT Press. This book was released on 2015-11-06 with total page 767 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive technical history of air, land, sea, and underwater unmanned systems, by a distinguished U.S. Navy roboticist. Military drones have recently been hailed as a revolutionary new technology that will forever change the conduct of war. And yet the United States and other countries have been deploying such unmanned military systems for more than a century. Written by a renowned authority in the field, this book documents the forgotten legacy of these pioneering efforts, offering the first comprehensive historical and technical accounting of unmanned air, land, sea, and underwater systems. Focusing on examples introduced during the two world wars, H. R. Everett meticulously traces their development from the mid-nineteenth century to the early Cold War. A pioneering Navy roboticist, Everett not only describes these systems in detail but also reverse-engineers the designs in order to explain how they operated in real-world conditions of the time. More than 500 illustrations—photographs, drawings, and plans, many of them never before published—accompany the text. Everett covers the evolution of early wire-guided submersibles, tracing the development of power, propulsion, communication, and control; radio-controlled surface craft, deployed by both Germany and Great Britain in World War I; radio-controlled submersibles; radio-controlled aircraft, including the TDR-1 assault drone project in World War II—which laid the groundwork for subsequent highly classified drone programs; and remote-controlled ground vehicles, including the Wehrmacht's Goliath and Borgward demolition carriers.

Download or read book Blue Legalities written by Irus Braverman and published by Duke University Press. This book was released on 2020-01-17 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ocean and its inhabitants sketch and stretch our understandings of law in unexpected ways. Inspired by the blue turn in the social sciences and humanities, Blue Legalities explores how regulatory frameworks and governmental infrastructures are made, reworked, and contested in the oceans. Its interdisciplinary contributors analyze topics that range from militarization and Maori cosmologies to island building in the South China Sea and underwater robotics. Throughout, Blue Legalities illuminates the vast and unusual challenges associated with regulating the turbulent materialities and lives of the sea. Offering much more than an analysis of legal frameworks, the chapters in this volume show how the more-than-human ocean is central to the construction of terrestrial institutions and modes of governance. By thinking with the more-than-human ocean, Blue Legalities questions what we think we know—and what we don’t know—about oceans, our earthly planet, and ourselves. Contributors. Stacy Alaimo, Amy Braun, Irus Braverman, Holly Jean Buck, Jennifer L. Gaynor, Stefan Helmreich, Elizabeth R. Johnson, Stephanie Jones, Zsofia Korosy, Berit Kristoffersen, Jessica Lehman, Astrida Neimanis, Susan Reid, Alison Rieser, Katherine G. Sammler, Astrid Schrader, Kristen L. Shake, Phil Steinberg

Download or read book Unmanned Aircraft Systems Uas in the Cyber Domain Protecting Usa s Advanced Air Assets written by Julie J. C. H. Ryan and published by Independently Published. This book was released on 2018-09-14 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned Aircraft Systems (UAS) are an integral part of the US national critical infrastructure. They must be protected from hostile intent or use to the same level as any other military or commercial asset involved in US national security. However, from the Spratly Islands to Djibouti to heartland America, the expanding Chinese Unmanned Aircraft Systems (UAS / Drone) industry has outpaced the US technologically and numerically on all fronts: military, commercial, and recreational. Both countries found that there were large information security gaps in unmanned systems that could be exploited on the international cyber-security stage. Many of those gaps remain today and are direct threats to US advanced Air Assets if not mitigated upfront by UAS designers and manufacturers. The authors contend that US military / commercial developers of UAS hardware and software must perform cyber risk assessments and mitigations prior to delivery of UAS systems to stay internationally competitive and secure. The authors have endeavored to bring a breadth and quality of information to the reader that is unparalleled in the unclassified sphere. This book will fully immerse and engage the reader in the cyber-security considerations of this rapidly emerging technology that we know as unmanned aircraft systems (UAS). Topics covered include National Airspace (NAS) policy issues, information security, UAS vulnerabilities in key systems (Sense and Avoid / SCADA), collision avoidance systems, stealth design, intelligence, surveillance and reconnaissance (ISR) platforms; weapons systems security; electronic warfare considerations; data-links, jamming operational vulnerabilities and still-emerging political scenarios that affect US military / commercial decisions.

Download or read book One Nation Under Drones written by John E Jackson and published by Naval Institute Press. This book was released on 2018-11-15 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: One Nation Under Drones is an interesting and informative review of how robotic and unmanned systems are impacting every aspect of American life, from how we fight our wars; to how we play; to how we grow our food. Edited by Professor John Jackson, who holds the E.A. Sperry Chair of Unmanned and Robotic Systems at the United States Naval War College, this highly readable book features chapters from a dozen experts, researchers, and operators of the sophisticated systems that have become ubiquitous across the nation and around the world. Press reports have focused primarily on Unmanned Aerial Vehicles, officially designated as UAVs, but more often referred to as "drones". This book takes you behind the scenes and describes how Predators, Reapers, Scan Eagles and dozens of other pilotless aircraft have been used to fight the Global War on Terrorism. Although these systems seemed to emerge fully-developed into the skies above America's distant battlefields following the attacks of 9-11-2001, readers will discover how they actually trace their lineage to the First World War, when the "automatic airplane/aerial torpedo", designed and built by the Sperry Gyroscope Company, made its first flight just over a century ago. Unmanned aircraft were used by various combatants in World War II, and took many forms: from converted manned bombers to inter-continental attacks on the American homeland by rice-paper balloons. Technology developed in the latter decades of the 20th century enabled crews stationed thousands of miles away to attack targets on remote battlefields. Such long-range and remote-controlled weapons have been extensively used, but are controversial from both legal and ethical stand-points. Chapters written by international law specialists and drone pilots with advanced education in ethics address these issues from both sides of the argument. The book also details how robotic systems are being used on land, in and below the seas, and in civilian applications such as driverless cars. Three dozen photographs display drones as small as an insect up to those as large as a 737 airliner. One Nation Under Drones covers such a wide array of topics that it will be of interest to everyone from the casual reader seeking to know more about these systems, to national security professionals, both in and out of uniform, who will be making decisions about their procurement and use in decades to come. This work will become the definitive volume on the subject, providing the facts and avoiding the hype about systems that have moved off the pages of science fiction and into the environment all around us.

Download or read book Introduction to Unmanned Aircraft Systems written by R. Kurt Barnhart and published by CRC Press. This book was released on 2016-10-26 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to Unmanned Aircraft Systems surveys the fundamentals of unmanned aircraft system (UAS) operations, from sensors, controls, and automation to regulations, safety procedures, and human factors. It is designed for the student or layperson and thus assumes no prior knowledge of UASs, engineering, or aeronautics. Dynamic and well-illustrated, the first edition of this popular primer was created in response to a need for a suitable university-level textbook on the subject. Fully updated and significantly expanded, this new Second Edition: Reflects the proliferation of technological capability, miniaturization, and demand for aerial intelligence in a post-9/11 world Presents the latest major commercial uses of UASs and unmanned aerial vehicles (UAVs) Enhances its coverage with greater depth and support for more advanced coursework Provides material appropriate for introductory UAS coursework in both aviation and aerospace engineering programs Introduction to Unmanned Aircraft Systems, Second Edition capitalizes on the expertise of contributing authors to instill a practical, up-to-date understanding of what it takes to safely operate UASs in the National Airspace System (NAS). Complete with end-of-chapter discussion questions, this book makes an ideal textbook for a first course in UAS operations.

Download or read book Deep Sea Drones written by Martha London and published by ABDO. This book was released on 2020-12-15 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of the world's oceans remain unexplored. Underwater drones help researchers find shipwrecks and learn more about ocean habitats. Deep-Sea Drones explains how these drones work and how they can be used to make scientific breakthroughs now and in the future. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, an infographic, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Kids Core is an imprint of Abdo Publishing, a division of ABDO.

Download or read book Autonomous Vehicles in Support of Naval Operations written by National Research Council and published by National Academies Press. This book was released on 2005-08-05 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Autonomous vehicles (AVs) have been used in military operations for more than 60 years, with torpedoes, cruise missiles, satellites, and target drones being early examples.1 They have also been widely used in the civilian sector-for example, in the disposal of explosives, for work and measurement in radioactive environments, by various offshore industries for both creating and maintaining undersea facilities, for atmospheric and undersea research, and by industry in automated and robotic manufacturing. Recent military experiences with AVs have consistently demonstrated their value in a wide range of missions, and anticipated developments of AVs hold promise for increasingly significant roles in future naval operations. Advances in AV capabilities are enabled (and limited) by progress in the technologies of computing and robotics, navigation, communications and networking, power sources and propulsion, and materials. Autonomous Vehicles in Support of Naval Operations is a forward-looking discussion of the naval operational environment and vision for the Navy and Marine Corps and of naval mission needs and potential applications and limitations of AVs. This report considers the potential of AVs for naval operations, operational needs and technology issues, and opportunities for improved operations.

Download or read book Unmanned and Autonomous Ships written by R. Glenn Wright and published by Routledge. This book was released on 2020-03-11 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned ships and autonomous ships are quickly becoming a reality, making shipping safer and more efficient. However, traditional tasks and functions are becoming blurred as new technology changes how the unique needs of different sectors are met. In addition to large vessels dedicated to the transport of goods and cargos across the oceans, major efforts are underway towards the automation of small coastal shipping that includes ferries, tugboats, supply and service vessels, and barges. Automated vehicles are also replacing conventional ships for inspecting and servicing pipelines, drilling platforms, wind farms and other offshore installations. Automated shipping is explored in terms of economics, technology, safety and the environment under the broad themes of ship design and engineering, command and control, navigation, communications, security, regulatory issues, and training. This includes initiatives for autonomous shipping as well as civilian implications of military ship automation programs. This book is primarily for maritime professionals, regulatory authorities, insurers, and environmental groups. It also suits undergraduate students involved in deck officer training, and graduate students and academics involved in research in ship design, operations and management.

Download or read book Navy Large Unmanned Surface and Undersea Vehicles written by Ronald O'Rourke and published by . This book was released on 2019-06-24 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Navy wants to develop and procure three new types of unmanned vehicles (UVs) in FY2020 and beyond-Large Unmanned Surface Vehicles (LUSVs), Medium Unmanned Surface Vehicles (MUSVs), and Extra-Large Unmanned Undersea Vehicles (XLUUVs). The Navy is requesting $628.8 million in FY2020 research and development funding for these three UV programs and their enabling technologies. The Navy wants to acquire these three types of UVs (which this report refers to collectively as large UVs) as part of an effort to shift the Navy to a new fleet architecture (i.e., a new combination of ships and other platforms) that is more widely distributed than the Navy's current architecture. Compared to the current fleet architecture, this more-distributed architecture is to include proportionately fewer large surface combatants (i.e., cruisers and destroyers), proportionately more small surface combatants (i.e., frigates and Littoral Combat Ships), and the addition of significant numbers of large UVs. The Navy wants to employ accelerated acquisition strategies for procuring these large UVs, so as to get them into service more quickly. The emphasis that the Navy placed on UV programs in its FY2020 budget submission and the Navy's desire to employ accelerated acquisition strategies in acquiring these large UVs together can be viewed as an expression of the urgency that the Navy attaches to fielding large UVs for meeting future military challenges from countries such as China. The LUSV program is a proposed new start project for FY2020. The Navy wants to procure two LUSVs per year in FY2020FY2024. The Navy wants LUSVs to be low-cost, high-endurance, reconfigurable ships based on commercial ship designs, with ample capacity for carrying various modular payloads-particularly anti-surface warfare (ASuW) and strike payloads, meaning principally anti-ship and land-attack missiles. The Navy reportedly envisions LUSVs as being 200 feet to 300 feet in length and having a full load displacement of about 2,000 tons. The MUSV program began in FY2019. The Navy plans to award a contract for the first MUSV in FY2019 and wants to award a contract for the second MUSV in FY2023. The Navy wants MUSVs, like LUSVs, to be low-cost, high-endurance, reconfigurable ships that can accommodate various payloads. Initial payloads for MUSVs are to be intelligence, surveillance and reconnaissance (ISR) payloads and electronic warfare (EW) systems. The Navy defines MUSVs as having a length of between 12 meters (about 39 feet) and 50 meters (about 164 feet). The Navy wants to pursue the MUSV program as a rapid prototyping effort under what is known as Section 804 acquisition authority. The XLUUV program, also known as Orca, was established to address a Joint Emergent Operational Need (JEON). The Navy wants to procure nine XLUUVs in FY2020-FY2024. The Navy announced on February 13, 2019, that it had selected Boeing to fabricate, test, and deliver the first four Orca XLUUVs and associated support elements. On March 27, 2019, the Navy announced that the award to Boeing had been expanded to include the fifth Orca. The Navy's large UV programs pose a number of oversight issues for Congress, including issues relating to the analytical basis for the more-distributed fleet architecture; the Navy's accelerated acquisition strategies and funding method for these programs; technical, schedule, and cost risk in the programs; the proposed annual procurement rates for the programs; the industrial base implications of the programs; the personnel implications of the programs; and whether the Navy has accurately priced the work it is proposing to do in FY2020 on the programs.

Download or read book Introduction to Unmanned Systems written by Jerry LeMieux and published by Createspace Independent Publishing Platform. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes unmanned air, ground, sea and space vehicles in detail. The introduction is written by Brian Binnie, the test pilot for SpaceShipOne and second commercial astronaut. The chapters are written by the world expert Unmanned Vehicle University faculty members that have PhDs in engineering and an average of 25 years of experience in unmanned systems. After describing each type of unmanned vehicle, the book goes on to describe the technologies that are common between these vehicles such as sensors, communications and autonomy. The book is beautifully illustrated with 100 color photos to make the content easy to understand. It is written at a level for the average person with no equations or graphs. The book is intended as an undergraduate textbook in unmanned systems and has questions to challenge the student at the end of each chapter. It can also be used to motivate those seeking to establish a career in unmanned systems. Commercial applications for unmanned systems are interleaved throughout the book. The book is used as a reference for the Unmanned Vehicle University UAV Fundamentals Course, the most comprehensive UAV course in the world. There is even a chapter on technology transition for commercial applications written by an AUVSI Chapter President. Purchase this soon to be collectors item written by the world experts in unmanned systems. Prepare yourself for a future in this exciting new industry. It will be a hundreds of billions to a trillion dollar industry in the future. Will you be prepared to take advantage of the new opportunities in the unmanned systems career field?

Download or read book Technology and Applications of Autonomous Underwater Vehicles written by Gwyn Griffiths and published by CRC Press. This book was released on 2002-11-28 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: The oceans are a hostile environment, and gathering information on deep-sea life and the seabed is incredibly difficult. Autonomous underwater vehicles are robot submarines that are revolutionizing the way in which researchers and industry obtain data. Advances in technology have resulted in capable vehicles that have made new discoveries on how th

Download or read book Intelligent Marine and Aerial Vehicles written by Er Meng Joo and published by Nova Science Publishers. This book was released on 2018 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unmanned marine vehicles (UMVs) is a collective term commonly used to describe autonomous underwater vehicles, remotely operated vehicles, semi-submersibles, and unmanned surface craft. UMVs are heavily used in the military, civilian, and scientific communities for undertaking designated missions whilst either operating autonomously and/or in co-operation with other types of vehicles. Advanced marine vehicles are increasing their capabilities and the degree of autonomy more and more in order to perform more sophisticated maritime missions. Remotely operated vehicles are no longer cost-effective since they are limited by economic support costs, and the presence and skills of the human operator. Alternatively, autonomous surface and underwater vehicles have the potential to operate with greatly reduced overhead costs and level of operator intervention.An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot aboard. UAVs are a component of an unmanned aircraft system (UAS); these include a UAV, a ground-based controller, and a system of communications between the two. Compared to manned aircraft, UAVs were originally used for missions too "dull, dirty or dangerous" for humans. While they originated mostly in military applications, their use is rapidly expanding to commercial, scientific, recreational, agricultural, and other applications such as policing, peacekeeping and surveillance, product deliveries, aerial photography, agriculture, smuggling, and drone racing. Civilian UAVs now vastly outnumber military UAVs, with estimates of over a million sold by 2015, so they can be seen as an early commercial application of Autonomous Things, to be followed by the autonomous car and home robots.Nowadays, UMVs and UAVs are playing an increasingly important role in both controlling community and engineering applications. For example, UMVs and UAVs provide more efficient ways to execute various challenging tasks. However, these systems are usually featured with dynamics coupling, actuator saturation, underactuated structure, time-varying disturbance, etc., thereby resulting in great challenges and difficulties in system analysis and controller design. Recently, by employing intelligent approaches, advanced control methodologies for unmanned systems have been rapidly developed. Note that the dynamic environment is usually changing and the unmanned systems must adapt themselves accordingly. In this context, on one hand, more efforts should be focused on the methodology of the learning system. For example, fast adaptation and self-organizing capability are essentially required. On the other hand, advanced analysis tools should be deployed to enhance the control performance. Towards this end, human-like intelligence should be integrated tightly with nonlinear design for complex control tasks of autonomous systems.The main objective of this edited book is to address various challenges and issues pertinent to the intelligent control of UMVs and UAVs. (Nova)

Download or read book Handbook of Unmanned Aerial Vehicles written by Kimon P. Valavanis and published by Springer. This book was released on 2014-08-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Unmanned Aerial Vehicles is a reference text for the academic and research communities, industry, manufacturers, users, practitioners, Federal Government, Federal and State Agencies, the private sector, as well as all organizations that are and will be using unmanned aircraft in a wide spectrum of applications. The Handbook covers all aspects of UAVs, from design to logistics and ethical issues. It is also targeting the young investigator, the future inventor and entrepreneur by providing an overview and detailed information of the state-of-the-art as well as useful new concepts that may lead to innovative research. The contents of the Handbook include material that addresses the needs and ‘know how’ of all of the above sectors targeting a very diverse audience. The Handbook offers a unique and comprehensive treatise of everything one needs to know about unmanned aircrafts, from conception to operation, from technologies to business activities, users, OEMs, reference sources, conferences, publications, professional societies, etc. It should serve as a Thesaurus, an indispensable part of the library for everyone involved in this area. For the first time, contributions by the world’s top experts from academia, industry, government and the private sector, are brought together to provide unique perspectives on the current state-of-the-art in UAV, as well as future directions. The Handbook is intended for the expert/practitioner who seeks specific technical/business information, for the technically-oriented scientists and engineers, but also for the novice who wants to learn more about the status of UAV and UAV-related technologies. The Handbook is arranged in a user-friendly format, divided into main parts referring to: UAV Design Principles; UAV Fundamentals; UAV Sensors and Sensing Strategies; UAV Propulsion; UAV Control; UAV Communication Issues; UAV Architectures; UAV Health Management Issues; UAV Modeling, Simulation, Estimation and Identification; MAVs and Bio-Inspired UAVs; UAV Mission and Path Planning; UAV Autonomy; UAV Sense, Detect and Avoid Systems; Networked UAVs and UAV Swarms; UAV Integration into the National Airspace; UAV-Human Interfaces and Decision Support Systems; Human Factors and Training; UAV Logistics Support; UAV Applications; Social and Ethical Implications; The Future of UAVs. Each part is written by internationally renowned authors who are authorities in their respective fields. The contents of the Handbook supports its unique character as a thorough and comprehensive reference book directed to a diverse audience of technologists, businesses, users and potential users, managers and decision makers, novices and experts, who seek a holistic volume of information that is not only a technical treatise but also a source for answers to several questions on UAV manufacturers, users, major players in UAV research, costs, training required and logistics issues.

Download or read book Navigation and Control of Autonomous Marine Vehicles written by Sanjay Sharma and published by Institution of Engineering and Technology. This book was released on 2019-04-02 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Robotic marine vessels can be used for a wide range of purposes, including defence, marine science, offshore energy and hydrographic surveys, and environmental surveys and protection. Such vessels need to meet a variety of criteria: they must be able to operate in salt water, and to communicate and be controlled over large distances, even when submerged or in inclement weather. Further challenges include 3D navigation of individual vehicles, groups or squadrons.