The Fleet Snorkel boats are often considered as Guppys. The Fleet Snorkel is a special class of boat. These boats were much like the Guppy IIs except they didn't have some of the internal modifications that the Guppy IIs had. They had two batteries and most still had closed cell vent-
lation and four engines. They had the distinctive sails of the conversion yard but they retained their fleet bows. It was simply a fleet boat with the snorkel induction and exhaust piping and masts, and an ESM mast. Most had BQR-2 sonar in the chin mount and had sonar in the space vacated by the magazine under the galley. The auxillary engine was replaced with two air con-
ditioning plants. The USS Irex (SS482) was the first boat to receive a snorkel.
