Description / Abstract: This revision to DO-286A separates Automatic Dependent Surveillance - Rebroadcast (ADS-R) from the TIS-B MASPS. The basic TIS-B services described in DO-286A remain fundamentally unchanged. The revision includes changes related to those previously made to RTCA DO-242 - MASPS for Automatic Dependent Surveillance - Broadcast (ADS-B) and DO-289 - MASPS for Aircraft Surveillance Applications (ASA). The revision should not impact equipment previously certified using DO-260A - MOPS for 1090 MHz Extended Squitter (ADS-B) and TIS-B or DO-286A.