Oceans’ extreme depths measured
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After 75,600km and 39 dives, the Five Deeps Expedition has completed the first manned descent to the bottom of the world’s five oceans
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DSSV “PRESSURE DROP”: Support ship equipped with multi-beam sonar to map seabed
Crew: 16-18 
Length: 68.3m
Submersible
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4 1
2 3
5

1 Challenger Deep Pacific Ocean 10,924m
2 Brownson Deep Atlantic Ocean 8,378m
3 Factorian Deep Southern Ocean 7,432m
4 Unnamed Deep Indian Ocean 7,187m
5 Molloy Hole Arctic Ocean 5,551m
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DSV “LIMITING FACTOR” Electrical power: 65kWh battery
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Titanium pressure hull
Two crew seated inside sphere measuring 90mm thick and with inner diameter of 1.5m
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Endurance: 16 hrs 
Descent to 11,000m: 2.5 hrs 
Emergency life support: 96 hrs
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Length: 4.6m
Manipulator 
Viewports
Lamps 
Thrusters
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Sources: The Five Deeps Expedition, Geoscience Data Journal, BBC
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