The TCAS Change 7.1 Updates are designed to reduce the risk of possible mid-air collisions in the increasingly congested skies around the world. H&G hold stock of various systems manufactured by Honeywell, Rockwell Collins and ACSS. Please contact H&G to discuss how we can support your upgrade to ensure your aircraft remains fully compliant with TSO-C119c and ETSO-C119c, including both RTCA/DO-185B for TCAS II Change 7.1 and RTCA/DO-300 for Hybrid Surveillance.