What is the difference between VHF Channel 16 and Channel 70?
Short answer
Channel 16 is for voice distress, urgency, safety and calling; Channel 70 is for DSC alerts only.
Do not make voice calls on Channel 70. DSC alerts are sent digitally on Channel 70, then the follow-up voice procedure normally moves to Channel 16 or another instructed working channel.
Quick check
What is the difference between VHF Channel 16 and Channel 70?