Radio Hangar explores TCAS, the Resolution Advisory, and the Automated Voice That Overrules Air Traffic Control When Two Airplanes Are Thirty Seconds From Hitting.
A pilot's guide to FAR 91.113 right-of-way rules: who yields in converging, head-on, and overtaking encounters, and why the answer is almost always 'turn right.'
FAR 91.113 establishes a right of way hierarchy based on aircraft maneuverability - understand the principle and the entire pecking order becomes logical, not memorized.
ACAS X replaces TCAS II's 1990s-era lookup table with a real-time dynamic programming algorithm designed for drones, eVTOLs, and modern mixed airspace.
The 2002 Überlingen midair collision killed 71 people and permanently established that a TCAS Resolution Advisory legally outranks an air traffic controller.