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Made for Your Country Measured From the Grid Every depth is read from NOAA's public grid when you order, and the margin names the day.
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13 of 20 Deeps Within Tolerance Each named deep's published depth against our grid's reading, with every miss and its reason.
Check Every Receipt Challenger Deep Outside tolerance
Published 10,935 m Our grid reads 10,581 m Difference −354 m Tolerance 328 m The grid reads 354 m shallower, past the 328 m tolerance.
Published by Greenaway et al., Deep-Sea Research Part I 178:103644 (2021), doi:10.1016/j.dsr.2021.103644, NOAA Institutional Repository
Horizon Deep Within tolerance
Published 10,816 m Our grid reads 10,767 m Difference −49 m Tolerance 324 m Published by Bongiovanni, Stewart & Jamieson, Geoscience Data Journal 9:108-123 (2022, online 2021), doi:10.1002/gdj3.122
Scholl Deep Within tolerance
Published 10,011 m Our grid reads 10,102 m Difference +91 m Tolerance 300 m Published by Jamieson, Giles & Stewart, Marine Geophysical Research 45:17 (2024), doi:10.1007/s11001-024-09550-7
Galathea Depth Within tolerance
Published 10,025 m Our grid reads 10,018 m Difference −7 m Tolerance 301 m Published by Jamieson & Stewart, 'Hadal zones of the Northwest Pacific Ocean', Progress in Oceanography 190:102477 (2021), doi:10.1016/j.pocean.2020.102477 (accepted manuscript on NORA; depths from GMRT)
Kuril-Kamchatka Trench deepest point Within tolerance
Published 9,604 m Our grid reads 9,595 m Difference −9 m Tolerance 288 m Published by Dreutter, Steffen, Martínez Arbizu & Brandt, 'Will the top five deepest trenches lose one of their members?', Progress in Oceanography (2020), article 102258
Izu-Ogasawara Trench deepest point Outside tolerance
Published none Our grid reads 9,842 m No settled published figure to set beside ours.
Published by Jamieson & Stewart, Progress in Oceanography 190:102477 (2021), doi:10.1016/j.pocean.2020.102477 (accepted manuscript; GMRT)
Japan Trench deepest point Within tolerance
Published 8,046 m Our grid reads 8,037 m Difference −9 m Tolerance 241 m Published by Jamieson & Stewart, Progress in Oceanography 190:102477 (2021), doi:10.1016/j.pocean.2020.102477 (accepted manuscript; GMRT)
Brownson Deep Within tolerance
Published 8,378 m Our grid reads 8,516 m Difference +138 m Tolerance 251 m Published by Bongiovanni, Stewart & Jamieson, Geoscience Data Journal 9:108-123 (2022, online 2021), doi:10.1002/gdj3.122
Meteor Deep Within tolerance
Published 8,265 m Our grid reads 8,221 m Difference −44 m Tolerance 248 m Published by Bongiovanni, Stewart & Jamieson, Geoscience Data Journal 9:108-123 (2022, online 2021), doi:10.1002/gdj3.122
Atacama Deep Within tolerance
Published 8,087 m Our grid reads 7,988 m Difference −99 m Tolerance 243 m Published by IHO-IOC GEBCO Gazetteer of Undersea Feature Names, feature 890143 'Atacama Deep' (approved SCUFN-37, discovered 2018)
Cayman Trough deepest point Outside tolerance
Published 7,686 m Our grid reads 6,984 m Difference −702 m Tolerance 231 m Read round the gazetteer's point, with no published position for the deepest sounding: the grid reads 702 m shallower, past the 231 m tolerance.
Published by Lemenkova, Annales Universitatis Mariae Curie-Skłodowska sectio B 75:115-141 (2020), doi:10.17951/b.2020.75.0.115-141
Sunda (Java) Trench deepest point Within tolerance
Published 7,187 m Our grid reads 7,122 m Difference −65 m Tolerance 216 m Published by Bongiovanni, Stewart & Jamieson, Geoscience Data Journal 9:108-123 (2022, online 2021), doi:10.1002/gdj3.122
Molloy Deep Within tolerance
Published 5,551 m Our grid reads 5,561 m Difference +10 m Tolerance 167 m Published by Bongiovanni, Stewart & Jamieson, Geoscience Data Journal 9:108-123 (2022, online 2021), doi:10.1002/gdj3.122
Litke Deep Outside tolerance
Published 4,000 m Our grid reads not read Tolerance 150 m No published position to read the grid round.
Published by Stewart & Jamieson, Earth-Science Reviews 197:102896 (2019)
Calypso Deep Within tolerance
Published 5,122 m Our grid reads 5,126 m Difference +4 m Tolerance 154 m Published by Hanke et al., 'Marine litter in the deepest site of the Mediterranean Sea', Marine Pollution Bulletin 213:117610 (2025)
Monterey Canyon Outside tolerance
Published 4,000 m Our grid reads 4,389 m Difference +389 m Tolerance 150 m Published as >, a bound rather than a sounding.
Published by USGS Open-File Report 2016-1072, California State Waters Map Series: Monterey Canyon and vicinity (pamphlet)
Nazaré Canyon Within tolerance
Published 5,000 m Our grid reads 5,100 m Difference +100 m Tolerance 150 m Published by Tyler et al., 'Europe's Grand Canyon: Nazaré Submarine Canyon', Oceanography 22(1) (2009)
Kaikoura Canyon Outside tolerance
Published none Our grid reads not read No settled published figure to set beside ours.
Hikurangi Trough Outside tolerance
Published none Our grid reads 3,208 m No settled published figure to set beside ours.
Ryukyu Trench Within tolerance
Published 7,447 m Our grid reads 7,449 m Difference +2 m Tolerance 223 m Published by Jamieson & Stewart, Progress in Oceanography 190:102477 (2021), doi:10.1016/j.pocean.2020.102477 (accepted manuscript; GMRT)
We hope The Philippines ends up where you pass it every day.
