ČSA Flight 511 was a scheduled passenger flight operated by Czechoslovak Airlines that tragically ended in disaster at Casablanca–Anfa Airport in Morocco. The aircraft, a Douglas DC-6B, was transporting 78 individuals, including 74 passengers and 4 crew members, from Prague to Morocco with a stopover in Algiers. As the flight approached its destination on July 12, 1961, it encountered thick fog and heavy rain, which significantly impaired visibility for the pilots. Despite the challenging conditions, the flight made an attempt to land at Casablanca. Unfortunately, as the aircraft descended, it struck terrain before reaching the runway, resulting in a catastrophic crash.Rescue operations were immediately launched, but the impact proved to be devastating, with only 6 survivors among the 78 on board. The tragedy prompted an urgent investigation by aviation authorities to determine the cause of the accident. Preliminary findings indicated that weather played a critical role in the crash, compounded by potential miscommunication between the flight crew and air traffic control as they attempted to navigate the challenging landing conditions. In the aftermath, there were widespread discussions on flight safety and the need for improved weather reporting and aviation technology in the region.