High?resolution multibeam sonar bathymetry of the deepest place in each ocean

Over the course of 10 months, global Five Deeps Expedition (2018–2019) mapped ~550,000 km2 seafloor which 61% comprised new coverage over areas never before surveyed and ~30% was acquired from some ocean's deepest trenches fracture zones. The points each ocean were using a latest-generation, full-ocean depth Kongsberg EM 124 multibeam echosounder. These extreme depths corrected Conductivity, Temperature Depth (CTD) data sea surface to full depth. place in identified as Brownson Deep, Puerto Rico Trench Atlantic Ocean (8,378 ± 5 m), an unnamed deep within South Sandwich Southern (7,432 13 Java Indian (7,187 Challenger Deep Mariana Pacific (10,924 15 Molloy Hole Arctic (5,551 14 m). As part overarching mission Expedition, clarify beyond doubt point Indian, oceans, other sites visited that had been postulated potential locations. This study has confirmed Horizon Tonga is second (10,816 16 Dordrecht Diamantina Fracture Zone not (7,019 17 m) accordance with guidelines Antarctic Treaty International Hydrographic Organisation, although Meteor (8,265 it located waters Ocean.