Rochelle Anne Wigley¹, Yulia Zarayskaya², Karolina Zwolak³, Jaya A Roperez⁴, Evgenia Bazhenova⁵, Masanao Sumiyoshi⁶, Seeboruth Shailesh Sattiabaruth⁷, Aileen Bohan⁸, Tomer Ketter⁴, Ivan Ryzhov⁹, Christina Lacerda¹⁰, Mohamed Elsaied Abou-Mahmoud¹¹, Hadar Sade¹², Neil Tinmouth¹³, Alison Proctor¹⁴, Craig Wallace¹⁵, Wetherbee Bryan Dorshow¹⁶, Timothy Kearns¹⁷, Robin K H Falconer¹⁸, Bob Anderson¹⁹ and Benjamin Simpson²⁰, (1)University of New Hampshire Main Campus, Durham, NH, United States, (2)Russian Academy of Sciences, Laboratory of Ocean Floor Geomorphology and Tectonics, Geological Institute, Moscow, Russia, (3)Polish Naval Academy, Gdynia, Poland, (4)University of New Hampshire Main Campus, Center for Coastal and Ocean Mapping, Durham, NH, United States, (5)NIWA, Wellington, New Zealand, (6)Hydrographic and Oceanographic Department, Japan Coast Guard, Tokyo, Japan, (7)Ministry of housing and lands, Quatre Bornes, Mauritius, (8)Geological Survey of Ireland, Dublin, Ireland, (9)Arctic and Antarctic Research Institute, St Petersburg, Russia, (10)NF/GEBCO Training Alumni, Rio de Janeiro, Brazil, (11)Faculty of Petroleum and Mining Science Matrouh University, Petroleum Geology Department, Matrouh, Egypt, (12)Yam-Yafo Ltd., Rishon Lezion, Israel, (13)NF/GEBCO Training Alumni, Cape Town, South Africa, (14)Ocean Floor Geophysics Inc., Burnaby, Canada, (15)Kongsberg Maritime AS, Aberdeen, United Kingdom, (16)Organization Not Listed, Washington, DC, United States, (17)Numurus, Seattle, United States, (18)GEBCO, Wellington, New Zealand, (19)GEBCO, New York, United States, (20)Hushcraft Ltd, Mersea, United Kingdom