In 2017 the vessel was bought by Caladan Oceanic LLC and prepared to serve as a mother ship for the manned deep-ocean research submersible DSV Limiting Factor.
The vessel was named DSSV Pressure Drop because the financial sponsor Victor Vescovo admires the ship names found in the  Culture novels written by Iain M. Banks.

Beginning in December 2018, the Pressure Drop began execution of the Five Deeps Expedition to support a manned submersible visit to the bottom of all five of the world's oceans.
On December 19, 2018, the first of the five oceans bottoms was visited: the bottom of the Atlantic at the Puerto Rico trench.
In August 2019, the Pressure Drop completed the Five Deeps Expedition after the Limiting Factor submersible successfully made the first manned descent to the bottom of the Arctic Ocean, the Molloy Deep.
In 2017 the vessel was bought by Caladan Oceanic LLC and prepared to serve as a mother ship for the manned deep-ocean research submersible DSV Limiting Factor. The vessel was named DSSV Pressure Drop because the financial sponsor Victor Vescovo admires the ship names found in the  Culture novels written by Iain M. Banks. 
Beginning in December 2018, the Pressure Drop began execution of the Five Deeps Expedition to support a manned submersible visit to the bottom of all five of the world's oceans. On December 19, 2018, the first of the five oceans bottoms was visited: the bottom of the Atlantic at the Puerto Rico trench. In August 2019, the Pressure Drop completed the Five Deeps Expedition after the Limiting Factor submersible successfully made the first manned descent to the bottom of the Arctic Ocean, the Molloy Deep.
USNS Indomitable (T-AGOS-7)