	An obsolescent boat, the Papanikolis has been upgraded to fire Mk-37 dual-role wire-guided torpedoes. Guppy IIA class, originally USS Hardhead. As part of their modernization in the '50s, Guppy IIs had to have a main engine removed so as to be able to relocate auxilliary equipment away from the new sonars.
	The Katsonis is a Guppy III, but the differences are negligible. Formerly USS Remora.