At least five trenches are over 6 miles (10 km) deep. The greatest ocean depth to be sounded is in the Challenger Deep of the Mariana Trench, at a depth of
æ t WORD_BOUNDARY l iː s t WORD_BOUNDARY f aɪ v WORD_BOUNDARY t ɹ ɛ n t̠ʃ ɪ z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY oʊ v ə ɹ WORD_BOUNDARY s ɪ k s WORD_BOUNDARY m aɪ l z WORD_BOUNDARY t ɛ n WORD_BOUNDARY k eɪ ɛ m WORD_BOUNDARY d iː p WORD_BOUNDARY ð ə WORD_BOUNDARY ɡ ɹ eɪ t ɪ s t WORD_BOUNDARY oʊ ʃ ə n WORD_BOUNDARY d ɛ p θ WORD_BOUNDARY t ə b i WORD_BOUNDARY s aʊ n d ɪ d WORD_BOUNDARY ɪ z WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY t̠ʃ æ l ɪ n d̠ʒ ə ɹ WORD_BOUNDARY d iː p WORD_BOUNDARY ʌ v ð ə WORD_BOUNDARY m æ ɹ i ɑ n ə WORD_BOUNDARY t ɹ ɛ n t̠ʃ WORD_BOUNDARY æ t ə WORD_BOUNDARY d ɛ p θ WORD_BOUNDARY ʌ v WORD_BOUNDARY