What is PBCS
Performance Based Communication and surveillance
What RCP
Required Communication Performance
What does RCP400 mean
Maximum elapsed time for messages 400 seconds
What is the standard separation for oceanic crossings with HF radio
50 NM horizontal and 10 minutes or greater longitudinal separation
What is the horizontal and longitudinal separation necessary for PBCS with CPDLC as the primary communication RCP240
30 NM horizontal and reduced longitudinal separation