For other uses of the name Carmelita, see: Carmelita.
Near the beginning of The Grim Grotto, the submarine came close to apprehending the Queequeg, but was scared away by The Great Unknown; later in the book, the submarine succeeded in capturing the Queequeg in the Gorgonian Grotto. The submarine found its way to Hotel Denoument, two days before the V.F.D. meeting. It was then taken again by Fiona and Fernald who were suppose to keep watch of it
Count Olaf, Esmé Squalor, Carmelita Spats, and Fernald are known crew members. The Snow Scouts captured on Mount Fraught, some students from Prufrock Preparatory School, and other children whom the Baudelaires did not know were forced to row the submarine.
The submarine, from the outside, looks like a large mechanical octopus, with a dome shaped head, two porthole eyes, and many small protruding tubes that move it about in the water. These tentacles are controlled by a group of kidnapped children, seated on two rows of wooden benches, in what is called the "rowing room." While the children are forced to row the long metal oars that move the outer metal arms, Carmelita Spats holds tap-dancing ballerina fairy princess veterinarian dance recitals and sings a song she wrote herself. Inside, there is also a "brig" commanded by Fernald, and a long, dark tunnel whose metallic walls are covered in eerie glowing eyes. This tunnel can be used to capture other ships. Each of the doors within the submarine is opened by pressing a button in the shape of an eye.
The ship has a sonar system, an enormous flyswatter, a lifetime supply of matches, several cases of wine, and a closet full of very stylish outfits.
The crew of The Carmelita wear bodysuits made of a shiny, sturdy, waterproof material that display a portrait of Edgar Guest on the chest.