PEPA, or Prodigious Espionage Patrol Aircraft is a large military espoinage and bomber aircraft, and was developed for the Caladian and USA Air Forces, for maritime and land patrol, and use as a bomber and espionage as well.The PEPA is the largest military transport aircraft, not including dirigibles.As of October 2010, 57 of the PEPA units have been manufactured,with 46 of them being introduced into the USA Air Force.