three times have we been to the bottom of the mariana trench.
three times have we been to the bottom of the mariana trench.
how many times have we been to the bottom of the mariana trench?
three
on 7 may 2019 victor vescovo (pilot) and dr. alan jamieson (chief scientist) made the first manned descent to the bottom of the sirena deep in the deep-submergence vehicle "dsv limiting factor" (a triton 36000/2 model submersible) and mesured a depth of ±. this descent occurred just after descending four times to the bottom of the nearby challenger deep. work focused on geological, biological and video survey and collection in the mariana trench basin. they spent 176 minutes on the bottom of the sirena deep and the deepest piece of mantle rock ever recovered from the surface of the western slope of the mariana trench was collected. the miriana trench and the operating area was surveyed by the support ship, the deep submersible support vessel "dssv pressure drop", with a kongsberg simrad em124 multibeam echosounder system. the gathered data will be donated to the gebco seabed 2030 initiative. the dive was part of the five deeps expedition. the objective of this expedition is to thoroughly map and visit the deepest points of all five of the world's oceans by the end of september 2019.
sirena deep
bullet::::- marianas trench marine national monument, united states national monument at the trench. this national monument protects of submerged lands and waters of the mariana archipelago. it includes some of the mariana trench, but not the deepest part, the challenger deep, which lies just outside the monument area.









































section::::external links.









































bullet::::- mariana trench dive (25 march 2012) – deepsea challenger.









































bullet::::- mariana trench dive (23 january 1960) – trieste (newsreel).









































bullet::::- mariana trench dive (50th anniv) – trieste – capt don walsh.









































bullet::::- mariana trench – maps (google).









































bullet::::- noaa – ocean explorer (ofc ocean exploration & rsch).
mariana trench