A California-class Starfleet ship whose lower-deck officers worked beside the Cerritos crew at Jengus IV in 2381 and which later came to the Cerritos's aid.
The USS Carlsbad is a California-class support ship, one of the Cerritos's many sister vessels. It appears in the third season of Lower Decks.
In Mining the Mind's Mines, an away team of its junior officers is paired with Mariner, Boimler and Rutherford to clear psychic mines that turn thoughts into solid fantasies and nightmares. The Cerritos group assume the others look down on them. In fact the Carlsbad crew admire the Cerritos for its adventures, and the two teams together expose the scheme behind the mines.
In the season finale The Stars at Night, the Carlsbad is among the California-class ships that answer the call when the Cerritos faces the rogue automated Texas-class ships alone.