简答题  What should be included in MAYDAY messages?

简答题 What should a signal be prefixed by for distress traffic by radiotelephony?

简答题 How many times should the distress signal “MAYDAY” be spoken when sending a distress alert by radiotelephony?

简答题 Coastal radio stations keep a constant watch on distress frequencies. What frequencies are they? 

简答题 Which parties are those on-scene communications carried out between?

简答题  What should a station do when transmitting an inadvertent distress alert or call?

简答题 What does MAYDAY mean in marine communications?

简答题 Which channel is designated for VHF DSC alerting?