DSSV Pressure Drop sounded like a Culture ship name to me so I looked that up. It's not, but the name of the DDSV, "Limiting Factor", is. Apparently they also named their utility boats after Culture ships.
To those who don't know: "The Culture" is a... society(?) of godlike AI ships/minds from the series of SF books by Ian M. Banks.
SpaceX named their landing barges after Culture ships too, the "Of Course I Still Love You", "Just Read The Instructions" and "A Shortfall of Gravitas".