A dark, unmarked-looking Starfleet vessel operated by the mysterious Division 14, which collects victims of strange science accidents and takes them to a facility known as the Farm.
The USS Osler appears in the Lower Decks episode Much Ado About Boimler. It belongs to Division 14, a branch of Starfleet Medical that deals with injuries too odd for ordinary treatment, and it is named after the physician William Osler.
Brad Boimler is sent aboard after a transporter mishap leaves him out of phase, glowing and humming. Tendi goes with him, along with the genetically engineered dog she made, which has shown some alarming abilities.
The gloomy ship and its sinister-seeming Edosian commander persuade the other patients that the Farm does not exist and that they are being put out of sight for good. They mutiny. The Farm proves to be real, a luxurious medical spa, though Boimler's condition wears off before he can enjoy it.