PPA, Pattugliatore Polivalente d'Altura is the name of one the Italian Navy's new warship.
PPA, Pattugliatore Polivalente d'Altura (Offshore Multipurpose Patrol Ship) is a new Frigate class of the Italian Navy. 
A frigate is any of several types of warship, the term having been used for ships of various sizes and roles over the last few centuries. 
