Inex-Adria Aviopromet Flight 450, JP 450, was an international charter flight from Tivat in the Socialist Federal Republic of Yugoslavia to Prague, Czechoslovakia which crashed in the Prague suburb of Suchdol on October 30, 1975, at 09:20 AM. The McDonnell Douglas DC-9-32 with 115 passengers and 5 crew onboard descended, under Instrument Meteorological Conditions (IMC), below defined Minimum Descent Altitude (MDA) during the final approach to Prague Ruzyně Airport RWY 25, entered a gorge above Vltava river, and was unable to out-climb the rising terrain. The crash killed 75 of the 120 occupants. The accident remains the worst aviation disaster on the Czech Republic soil. Aircraft The aircraft operating the flight was a McDonnell Douglas DC-9-32, aircraft serial number 47457, manufactured in 1971, delivered new to Atlantis as before it was sold to Inex Adria Aviopromet in 1973 as . Accident The DC-9 was operated by Inex-Adria Aviopromet on a morning flight from Tivat to Prague with mostly Czechoslovakian tourists returning home from vacations on the Adriatic sea. Captain Miodrag Marović (40) and First Officer Rade Popov (49) had an uneventful flight with clear weather, until they entered a published landing procedure above PR non-directional beacon (NDB). Czechoslovakian ATC took over the aircraft at the border at 09:01. After identification, the crew asked for weather information. ATC responded that the total visibility in Prague is and on runway 25 (later known as runway 24) only . At the same time, ATC warned the crew that both the instrument landing system (ILS) for RWY 24 and the precision approach radar (PAR) were inoperative - "JP450, ILS and PAR are out of service on runway 25". The pilot asked - "I understand, but what do we do now?". ATC responded - "You can continue to Prague or divert to another airport." "Please wait" - the pilot replied. After a while, the pilot continued - "So the RVR of 1,100 meters and the ILS and approach lights out of service?" Since ATC never mentioned approach lights to be out of service, this message from the crew reveals that mental load started to build up caused by the uneasiness with the situation at the airport. ATC responded - "The ILS is out of order. The approach lights and the runway lights are working. There are also beacons (NDBs) in operation." Based on the information received, the crew decided to proceed according to the flight