ACAS X explained: How next‑generation collision‑avoidance and competing ROTOR/ALERT bills could prevent the next midair disaster
ACAS X is a next‑generation collision‑avoidance system offering trajectory‑based alerts and more precise advisories than TCAS. As Congress debates competing ROTOR and ALERT bills, lawmakers face choices on mandating ACAS X, ADS‑B cockpit displays and other fixes to address gaps identified after the 2025 Potomac midair collision.