This document provides the Minimum Operational Performance Standards for a TCAS which utilizes Hybrid Surveillance. Hybrid Surveillance specifies the judicious use of ADS-B data for surveillance of other aircraft thereby reducing TCAS utilization of the 1030 MHz and 1090 MHz air traffic control channels. TCAS compliant with this version of DO-300 will utilize a significantly smaller portion of the 1030 MHz and 1090 MHz channels than TCAS compliant to only DO-185B or to the previous version of DO-300. The motivation for this MOPS was to reduce TCAS use of the 1090 MHz channel as ADS-B utilization of this channel increases.