Challenger Deep Mysterious Door

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In November 2016 sonar mapping of the Challenger Deep area was conducted by the Royal Netherlands Institute for Sea Research (NIOZ)/GEOMAR Helmholtz Centre for Ocean Research Kiel aboard RV Sonne. Using a Kongsberg Maritime EM 122 multibeam echosounder system coupled to positioning equipment that can determine latitude and longitude the team determined that the Challenger Deep has a maximum depth of 10,925 m (35,843 ft) at 11°19′57″N 142°12′07″E / 11. 332417°N 142. 20205°E / 11. 332417; 142. 20205 (11°19. 945′N 142°12. 123′E / 11. 332417°N 142. 202050°E / 11. 332417; 142. 202050), with an estimated depth uncertainty of ±12 m (39 ft) (68% confidence level). The horizontal position of the grid point has an uncertainty of ±50 to 100 m (164 to 328 ft), depending on along-track or across-track direction. This depth (59 m (194 ft)) and position (about 410 m (1,345 ft) to the northeast) measurements differ significantly from the deepest point determined by the Gardner et al. (2014) study.