Tracking

Flying a heading that will maintain the desired track to or from the station regardless of crosswind conditions. Traffic Alert Collision Avoidance System (TCAS). An airborne system developed by the FAA that operates independently from the ground-based Air Traffic Control system. Designed to increase flight deck awareness of proximate aircraft and to serve as a “last line of defense” for the prevention of midair collisions.

Pilot's Handbook of Aeronautical Knowledge, p. G-31