**A close call over the Atlantic** On July 10, 2025, at approximately 01:23 UTC, two commercial airliners — an Iberia Airbus A321XLR and an Air Europa Boeing 787-9 — came dangerously close to colliding over the Atlantic Ocean off the Canary Islands. The Iberia flight IB140, en route from Recife, Brazil, to Madrid, was cruising at FL360 (36,000 feet) on airway N857. Simultaneously, Air Europa flight UX57, operating the reverse route from Madrid to São Paulo, was cleared to the same flight level on the same airway, heading in the opposite direction. The two aircraft were on a direct collision course. **TCAS saves the day** The onboard Traffic Collision Avoidance System (TCAS) detected the conflict and issued sequential alerts. First, a Traffic Advisory (TA) warned the crews of the proximity. Seconds later, a Resolution Advisory (RA) commanded immediate evasive action: the Iberia A321XLR descended 500 feet, while the Air Europa 787 climbed 400 feet. Moments after the maneuver, both crews received a "Clear of Conflict" message. The aircraft continued their flights and landed safely without further incident. **Investigation underway** Spain's Civil Aviation Accident and Incident Investigation Commission (CIAIAC) has opened an inquiry to determine how two airliners were assigned the same flight level on a busy oceanic route in opposite directions. Such occurrences are rare but serious, as oceanic airspace lacks the radar coverage typical of continental sectors, relying instead on procedural separation and pilot-controller datalink communications. **What this means for ATPL and ATC students** This incident is a textbook case for aviation trainees. It demonstrates the critical importance of TCAS — a system that operates independently of air traffic control and serves as the last line of defense against mid-air collisions. For ATPL students, understanding TCAS logic, RA compliance, and the phraseology used during such events is essential. For ATC trainees, this case highlights the challenges of managing oceanic airspace, where separation relies on accurate position reports and strict adherence to assigned routes and altitudes. The investigation will likely examine whether a communication error or a procedural lapse led to the loss of separation, offering valuable lessons for future safety improvements.