Challenger Deep

== English == === Etymology === Named after the British Royal Navy survey ship HMS Challenger, whose expedition of 1872–1876 made the first recordings of its depth. === Proper noun === Challenger Deep A deep in Mariana Trench, Pacific Ocean; a point in the Mariana Trench, known as the deepest point in the world's oceans. ==== Coordinate terms ==== HMRG Deep Sirena Deep Horizon Deep ==== Translations ==== === Further reading === “Challenger Deep, pn.”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022. “Challenger Deep”, in OneLook Dictionary Search.