This document contains Minimum Aviation System Performance Standards (MASPS) for AMS(R)S Data and Voice Communications Supporting Required Communications Performance (RCP) and Required Surveillance Performance (RSP) Revision C is updated to include the IRIDIUM CERTUS system. This requires also to update the interference section dealing with interference analysis between INMARSAT SBB and IRIDIUM CERTUS. It includes an analysis related to the potential usage of the INMARSAT SBB system as a command and control link for RPAS.