Have you ever imagined a ship that can float both normally (horizontally, like we all know) and in an inverted position, perpendicular to the water’s surface? As weird as it may sound, something like this exists! Or rather, it existed.
R/P FLIP or Floating Instrument Platform was a floating offshore ocean research platform-like structure that existed for almost 60 years until it was retired in 2021 and stands scrapped as of 2023.
A first (and till now the only) of its kind, this structure was...
https://www.marineinsight.com/types-of-ships/what-is-floating-instrument-platform/