Correction for the depth of The Challenger Deep (Marianas Trench)
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How long is 120 kilometers?
It's about eleven times as deep as The Challenger Deep (Marianas Trench)
The depth of The Challenger Deep (Marianas Trench) is about 10.9020 kilometers.
(near Marianas Islands, a.k.a. Ladrones Islands, northwestern Pacific Ocean) (depth below sea level)
The Challenger Deep, at the southern end of the Marianas Trench, reaches a depth of 10.902 km below sea level. The first manned expedition to the bottom of Challenger Deep took 4 hours and 48 minutes in 1960. This was the only manned descent to the floor of the Trench until 2012, when director James Cameron made the trip; several other descents have been made since then.