This course covers the Traffic Alert and Collision Avoidance System (TCAS) or Airborne Collision Avoidance System (ACAS), which is designed to reduce the risk of mid-air collisions between aircraft. The training focuses on the features of ACAS/TCAS II Version 7.1, which can issue two types of alerts: Traffic Advisories (TA) and Resolution Advisories (RA). TAs assist pilots in visual acquisition of conflicting aircraft and prepare them for potential RAs, while RAs provide instructions for vertical speed adjustments to avoid collisions. The course also covers the history of TCAS development, system operation, traffic advisories and resolution advisories, and operating procedures.