A.ship in distress and assisting units B.NCS and RCC C.RCCs and „0n-scene commander‟ or “co-ordinator surface search” D.ship in distress and coast station
A.SES/DSC/EPIRB B.SART/radiotelephone C.COSPAS-SARSAT D.both B and C
A.general communication B.distress alerting and safety calling C.receive MSI D.both B and C