sentences:  Satellite images from 2007 also show 2 new North Korean Helicopter Frigates; though it is unknown whether they are ready for service.Only 2 ships in the KPN have aviation capability with only the Nampo-class corvette the only active ship with facilities (so far only 1 Nampo vessel has visible landing pad).The aircraft would be the Mil Mi-4 PL Mil Mi-14 PL (ASW) and are flown by Korean People's Army Air and Anti-Air Force.