south (left). Returning to the previous consideration that the crew was under stress and overwhelmed mentally due to inoperative ILS and PAR, it is highly likely that they were rather focused on looking for an outside visual contact than on instruments. This standpoint is supported by Ladislav Keller, then Czechoslovakian civil pilot and air accident expert, who stated that the insufficient setting of the radio compasses indicated that the crew did not prepare well for landing, did not cooperate properly, and missed to monitor the instruments during the final approach. If the pilots would have been monitoring the altimeters and the approach map, they would have stopped the descent the latest at the Minimum Descent Altitude (MDA), used for non-precision approach. Unfortunately, this did not happen. Keller said: "If the crew stopped descending at decision height (Wiki author's comment: term Decision Height is used for a precision approach, while Minimum Descent Altitude term is used for a non-precision approach, which was flown by JP450), there would probably be no accident because the plane would fly about 90 meters above the runway threshold. However, the crew descended to an altitude of 100 meters below the runway threshold elevation. This indicates that the crew was totally disoriented, did not know their position and did not monitor the altimeter at all. There is a presumption that the pilot was not watching the instruments and looking out of the cockpit." 6,7 References External links used as references 1975: letadlo zmizelo v mlze, pak se ozval náraz. Zemřelo 77 lidí, article in Sedmička (retrieved from archive.org), including pictures from the site (in Czech) Article in Czech with photographs from the accident Accident Photos https://zpravy.aktualne.cz/domaci/foto-unikatni-snimky-uplynulo-45-let-co-prazsky-suchdol-zdev/r~0d10bfd01ab411eb9d74ac1f6b220ee8/v~nahledy/ https://www.idnes.cz/zpravy/cerna-kronika/40-let-od-padu-letadla-v-suchdole.A150925_115617_domaci_cen https://www.idnes.cz/technet/technika/nejhorsi-letecka-nehoda-ceskoslovensko-suchdol.A121029_145902_tec_technika_sit Aviation accidents and incidents in 1975 Aviation accidents and incidents in Czechoslovakia 1975 in Czechoslovakia 405 October 1975 events in Europe Accidents and incidents involving the McDonnell Douglas DC-9