The U.S.S. Poseidonis (NCC-59202) is an Olympic-class starship that is an experimental refit, re-designed to serve as an evacuation and hospital vessel for aquatic life. It is unique among Federation vessels in this respect.
The original version built for the module Poseidonis is given below, since you may wish to use it independently of the adventure. It was built with the Olympic-class spaceframe from Jester David, as the official version in the Command Division wasn’t available. It is more powerful than the official version.
I also give a Horizon-class version based on the official spaceframe in the Command Division. It looks really like an aquatic environment design with that Star Trek Online variant. However, I have tweaked it using our STO Horizon-class variant rules, and also swapped out some Talents (you can think of it as having had Milestones applied to the ship by its exemplary crew).
U.S.S. Poseidonis (2371, module version) PDFU.S.S. Poseidonis (2372, Horizon-class variant, after Milestones) PDF
Featured Starship articles spotlight established starships that you can use as a ship for players for immediate play (such as for a demo or convention game), or as an NPC ship in your campaign. Some are a natural fit with characters from the Featured Crew articles. Only Core Rulebook rules will be used (with perhaps a few special exceptions, such as the spaceframes from the Command Division supplement).