A.urgent traffic B.distress alert C.routine traffic D.NAVTEX message
A.keep silence B.interfere with such communication C.establish communication as directed and render such assistance as is required and appropriate D.refuse communication as directed and render such assistance as it required and appropriate
A.INMARSAT SES B.VHF/DSC or MF/DSC C.SART and VHF/DSC D.satellite EPIRB and VHF/DSC