the first, and so far only, person to reach the bottom of the molloy deep is victor vescovo on 24 august 2019. the five deeps expedition leader and chief submersible pilot, vescovo, descended into the malloy deep in the deep-submergence vehicle "dsv limiting factor" (a triton 36000/2 model submersible) from the support ship, the deep submersible support vessel "dssv pressure drop". the five deeps expedition established the depth of the molloy deep as ± by direct ctd pressure measurements. this is shallower than previous estimations using earlier technology with less precise bathymetric methods.