On May 13, 1913, Swiss aviator Oscar Bider made history by crossing the Bernese Alps in a Blériot monoplane. Departing from Bern's airfield at dawn, he flew 80 kilometers over the Wildstrubel glaciers, enduring temperatures near freezing at 3,200 meters. Despite the extreme conditions, he successfully reached Sion after landing on the Montana plateau. This feat, following his earlier crossing of the Pyrenees, earned him widespread acclaim and demonstrated the growing capabilities of early aircraft. For ATPL and ATC students, this event highlights the foundational challenges of mountain flying. Bider's flight required precise navigation without modern instruments, relying on visual landmarks and weather observation. The cold at altitude affected engine performance and pilot endurance—factors still critical in today's high-altitude operations. Understanding such early flights helps trainees appreciate how far aviation has come in terms of safety, technology, and route planning. The Bernese Alps crossing also underscores the importance of terrain awareness. Modern ATPL training includes mountain wave turbulence, downdrafts, and oxygen requirements at high altitudes—all concepts that Bider faced intuitively. ATC students can learn how early airspace management evolved from such pioneering flights, as pilots needed clear corridors and weather updates to avoid obstacles. Today, the Alps remain a challenging region for aviation, with specific procedures for VFR and IFR flights. Bider's 1913 journey serves as a reminder of the human factors involved in aviation: decision-making under pressure, physical resilience, and the courage to push boundaries. For students, it's a case study in how historical milestones shape current training and operational standards. In summary, Oscar Bider's flight over the Alps on May 13, 1913, is more than a historical curiosity—it's a lesson in the evolution of aviation safety, navigation, and the enduring respect for mountainous terrain. ATPL and ATC trainees can draw parallels to modern challenges, reinforcing the importance of thorough preparation and situational awareness.