This document contains Minimum Aviation System Performance Standards (MASPS) for Aeronautic Mobile Satellite (Route) Services (AMS(R)S) that provide safety communications to aircraft in airspace where 1) procedural separation is applied or 2) ATS surveillance services are provided. The main changes in this revision are: •Updates in the main document, and in Attachment 1 Inmarsat SwiftBroadband Specific Material, to the naming of the RCP and RSP performance criteria, in line with the latest naming used in RTCA DO-350A/ED-228A •Updates in Attachment 1 Inmarsat SwiftBroadband Specific Material, to allow for both cockpit voice calls to be provided via Packet Switched (PS) voice circuits •Updates in Attachment 1 Inmarsat SwiftBroadband Specific Material, to Appendix B: Interference Model for Emissions Associated with Ancilliary Terrestrial Component (ATCt) Ground Stations