Katsunori Mizuno, Technical Program Committee Co-Chair of UT21 Online, Beacon Associate Editor
The IEEE OES International Symposium on Underwater Technology 2021 (UT21) was postponed till March 2023 due to COVID-19. However, the organizers decided that the research on underwater technology and international exchange among researchers, students, and professionals should be continued and encouraged, so an online event was organized during the original symposium dates. The Underwater Technology 2021 online (UT21 Online), organized by the IEEE/OES Japan Chapter, Institute of Industrial Science, the University of Tokyo, and Earthquake Research Institute, the University of Tokyo, was held on 2 March, 2021, with technical co-sponsor, the IEEE Oceanic Engineering Society (IEEE/OES). A special program was prepared for this event: two keynote talks and an Underwater Video Competition (URL: http://www.ut2021.org).

There were 101 registrations from 13 countries. Due to the time difference, the maximum number of on-site participants was 27, but the number of on-demand (YouTube) viewers was up-to 124 during March 3-10, when the site was open. Prior to the event, the author gave an introduction to the symposium. A picture of cherry blossoms was used as a virtual background to give the audience a sense of Japanese spring. I hope it has been effective.

At the opening ceremony, Dr. Katsuyoshi Kawaguchi, a general co-chair of UT21 online, the Director of Engineering Department, Japan Agency for Marin-Earth Science and Technology (JAMSTEC), gave a welcome address. He explained the purpose of the event, wishing for the safety of people around the world, and stated that the society will contribute to the world today through the underwater technology.

Keynote talks
The introduction of Keynote speakers was given by Professor Changkyu Rheem, a general co-chair of UT21 online, IIS, The University of Tokyo. Professor Yosuke Kaifu, the university Museum, the University of Tokyo, gave the first keynote talk. Prof. Kaifu’s speech is on an experimental voyage project to unravel mysteries of Palaeolithic voyages in East Asia. In the project, he built several kinds of ancient boats and repeatedly tested them at sea, and finally rowed a round wooden boat from Taiwan to Yonaguni Island. The story of our ancestors’ challenge to the sea 30,000 years ago is an encouraging one for us today. People have overcome difficulties all the time!
The second talk was given by Professor Blair Thornton, IIS, the University of Tokyo / University of Southampton. He talked about autonomy beyond just the platform, and discussed how technology can help to overcome bottlenecks in the flow of information generated through robotic exploration, to help build human insight in a more scalable way. At the beginning of the presentation, there was a problem with the internet connection that caused the screen to freeze, but his quick thinking saved it. The network trouble is one of the possible risks of online events, but being flexible is always important.

Underwater Video Competition
As one of the special events of UT21 Online, an Underwater Video Competition was organized. This competition aims to stimulate research and development in undersea technology and oceanographic monitoring by providing intellectual stimulation to researchers and engineers by introducing their research and attractive videos to each other. In addition, we aim to build momentum for UT21, which has been postponed for two years. UT21 online called for videos designed to promote the appeal of Underwater Technology (Undersea Engineering) to a wide audience. Specific themes and categories for the videos were as follows:
- Environmental Monitoring
- Marine Robotics
- Marine Mineral Resources
- Renewable Energy
- Marine Construction
- Observatory and Disaster Mitigation
- Fishery Engineering
- Acoustics and Communications
- Sensors
Category 1 – Research Presentation (submitted 12, accepted 10)
Video is expected to be of an applicant speaking on research, however, as long as the video describes the research, the format is not limited to conventional presentation style.
Category 2 – General (submitted 20, accepted 14)
Any style of presentation is acceptable. For example, trouble, funny or unusual scenes, beautiful or exciting scenes captured on video during underwater experiment.
The nominated (accepted) videos were made public in advance on the website, and the rankings were determined by voting by OES members and technical committee members of UT21 Online.
Awards ceremony
According to the results of competition, an award ceremony was held. Professor Toshihiro Maki, a Technical Program Committee co-chair of UT 21 Online, IIS, the University of Tokyo, announced the ranking, followed by the screening of the award-winning videos and short speeches by the winners. The following prizes were awarded in each category.
- Grand Prize (1 winner per category)
- Runner-up (1 winner per category)
- Young Researcher Prize (2 winners per category)



Before the closing of UT21 Online, Dr. Kawaguchi made an announcement about Underwater Technology 2023 (UT23), which will be held during March 6-9, 2023, Tokyo, Japan. He said, “I sincerely hope things will turn around so that we can have an on-site event next time.” Finally, closing remarks were given by Professor Masanao Shinohara, a general co-chair of UT21 online, Earthquake Research Institute, the University of Tokyo.


This online event was very different from the previous onsite events, and many things were new to us from the preparation stage. However, we felt that there were some advantages, such as the success of the video competition and the fact that people in distant areas, who normally have difficulty participating, could easily participate. I think it was a good experience and the most important things were to be flexible and to do our best according to the situation. Thank you very much for your participation. Looking forward to seeing you at UT23 Tokyo!





Dr. James V. Candy is the Chief Scientist for Engineering and former Director of the Center for Advanced Signal & Image Sciences at the University of California, Lawrence Livermore National Laboratory. Dr. Candy received a commission in the USAF in 1967 and was a Systems Engineer/Test Director from 1967 to 1971. He has been a Researcher at the Lawrence Livermore National Laboratory since 1976 holding various positions including that of Project Engineer for Signal Processing and Thrust Area Leader for Signal and Control Engineering. Educationally, he received his B.S.E.E. degree from the University of Cincinnati and his M.S.E. and Ph.D. degrees in Electrical Engineering from the University of Florida, Gainesville. He is a registered Control System Engineer in the state of California. He has been an Adjunct Professor at San Francisco State University, University of Santa Clara, and UC Berkeley, Extension teaching graduate courses in signal and image processing. He is an Adjunct Full-Professor at the University of California, Santa Barbara. Dr. Candy is a Fellow of the IEEE and a Fellow of the Acoustical Society of America (ASA) and elected as a Life Member (Fellow) at the University of Cambridge (Clare Hall College). He is a member of Eta Kappa Nu and Phi Kappa Phi honorary societies. He was elected as a Distinguished Alumnus by the University of Cincinnati. Dr. Candy received the IEEE Distinguished Technical Achievement Award for the “development of model-based signal processing in ocean acoustics.” Dr. Candy was selected as a IEEE Distinguished Lecturer for oceanic signal processing as well as presenting an IEEE tutorial on advanced signal processing available through their video website courses. He was nominated for the prestigious Edward Teller Fellowship at Lawrence Livermore National Laboratory. Dr. Candy was awarded the Interdisciplinary Helmholtz-Rayleigh Silver Medal in Signal Processing/Underwater Acoustics by the Acoustical Society of America for his technical contributions. He has published over 225 journal articles, book chapters, and technical reports as well as written three texts in signal processing, “Signal Processing: the Model-Based Approach,” (McGraw-Hill, 1986), “Signal Processing: the Modern Approach,” (McGraw-Hill, 1988), “Model-Based Signal Processing,” (Wiley/IEEE Press, 2006) and “Bayesian Signal Processing: Classical, Modern and Particle Filtering” (Wiley/IEEE Press, 2009). He was the General Chairman of the inaugural 2006 IEEE Nonlinear Statistical Signal Processing Workshop held at the Corpus Christi College, University of Cambridge. He has presented a variety of short courses and tutorials sponsored by the IEEE and ASA in Applied Signal Processing, Spectral Estimation, Advanced Digital Signal Processing, Applied Model-Based Signal Processing, Applied Acoustical Signal Processing, Model-Based Ocean Acoustic Signal Processing and Bayesian Signal Processing for IEEE Oceanic Engineering Society/ASA. He has also presented short courses in Applied Model-Based Signal Processing for the SPIE Optical Society. He is currently the IEEE Chair of the Technical Committee on “Sonar Signal and Image Processing” and was the Chair of the ASA Technical Committee on “Signal Processing in Acoustics” as well as being an Associate Editor for Signal Processing of ASA (on-line JASAXL). He was recently nominated for the Vice Presidency of the ASA and elected as a member of the Administrative Committee of IEEE OES. His research interests include Bayesian estimation, identification, spatial estimation, signal and image processing, array signal processing, nonlinear signal processing, tomography, sonar/radar processing and biomedical applications.
Kenneth Foote is a Senior Scientist at the Woods Hole Oceanographic Institution. He received a B.S. in Electrical Engineering from The George Washington University in 1968, and a Ph.D. in Physics from Brown University in 1973. He was an engineer at Raytheon Company, 1968-1974; postdoctoral scholar at Loughborough University of Technology, 1974-1975; research fellow and substitute lecturer at the University of Bergen, 1975-1981. He began working at the Institute of Marine Research, Bergen, in 1979; joined the Woods Hole Oceanographic Institution in 1999. His general area of expertise is in underwater sound scattering, with applications to the quantification of fish, other aquatic organisms, and physical scatterers in the water column and on the seafloor. In developing and transitioning acoustic methods and instruments to operations at sea, he has worked from 77°N to 55°S.
René Garello, professor at Télécom Bretagne, Fellow IEEE, co-leader of the TOMS (Traitements, Observations et Méthodes Statistiques) research team, in Pôle CID of the UMR CNRS 3192 Lab-STICC.
Professor Mal Heron is Adjunct Professor in the Marine Geophysical Laboratory at James Cook University in Townsville, Australia, and is CEO of Portmap Remote Ocean Sensing Pty Ltd. His PhD work in Auckland, New Zealand, was on radio-wave probing of the ionosphere, and that is reflected in his early ionospheric papers. He changed research fields to the scattering of HF radio waves from the ocean surface during the 1980s. Through the 1990s his research has broadened into oceanographic phenomena which can be studied by remote sensing, including HF radar and salinity mapping from airborne microwave radiometers . Throughout, there have been one-off papers where he has been involved in solving a problem in a cognate area like medical physics, and paleobiogeography. Occasionally, he has diverted into side-tracks like a burst of papers on the effect of bushfires on radio communications. His present project of the Australian Coastal Ocean Radar Network (ACORN) is about the development of new processing methods and applications of HF radar data to address oceanography problems. He is currently promoting the use of high resolution VHF ocean radars, based on the PortMap high resolution radar.
Hanu Singh graduated B.S. ECE and Computer Science (1989) from George Mason University and Ph.D. (1995) from MIT/Woods Hole.He led the development and commercialization of the Seabed AUV, nine of which are in operation at other universities and government laboratories around the world. He was technical lead for development and operations for Polar AUVs (Jaguar and Puma) and towed vehicles(Camper and Seasled), and the development and commercialization of the Jetyak ASVs, 18 of which are currently in use. He was involved in the development of UAS for polar and oceanographic applications, and high resolution multi-sensor acoustic and optical mapping with underwater vehicles on over 55 oceanographic cruises in support of physical oceanography, marine archaeology, biology, fisheries, coral reef studies, geology and geophysics and sea-ice studies. He is an accomplished Research Student advisor and has made strong collaborations across the US (including at MIT, SIO, Stanford, Columbia LDEO) and internationally including in the UK, Australia, Canada, Korea, Taiwan, China, Japan, India, Sweden and Norway. Hanu Singh is currently Chair of the IEEE Ocean Engineering Technology Committee on Autonomous Marine Systems with responsibilities that include organizing the biennial IEEE AUV Conference, 2008 onwards. Associate Editor, IEEE Journal of Oceanic Engineering, 2007-2011. Associate editor, Journal of Field Robotics 2012 onwards.
Milica Stojanovic graduated from the University of Belgrade, Serbia, in 1988, and received the M.S. and Ph.D. degrees in electrical engineering from Northeastern University in Boston, in 1991 and 1993. She was a Principal Scientist at the Massachusetts Institute of Technology, and in 2008 joined Northeastern University, where she is currently a Professor of electrical and computer engineering. She is also a Guest Investigator at the Woods Hole Oceanographic Institution. Milica’s research interests include digital communications theory, statistical signal processing and wireless networks, and their applications to underwater acoustic systems. She has made pioneering contributions to underwater acoustic communications, and her work has been widely cited. She is a Fellow of the IEEE, and serves as an Associate Editor for its Journal of Oceanic Engineering (and in the past for Transactions on Signal Processing and Transactions on Vehicular Technology). She also serves on the Advisory Board of the IEEE Communication Letters, and chairs the IEEE Ocean Engineering Society’s Technical Committee for Underwater Communication, Navigation and Positioning. Milica is the recipient of the 2015 IEEE/OES Distinguished Technical Achievement Award.
Dr. Paul C. Hines was born and raised in Glace Bay, Cape Breton. From 1977-1981 he attended Dalhousie University, Halifax, Nova Scotia, graduating with a B.Sc. (Hon) in Engineering-Physics.