Yes pretty much. There are a lot of digital modes for different use cases. Usually packet radio is referring to APRS. You can encode all you want as long as you make the encoding/decoding spec public and as long as the decoded information still comply with the rest of the rules like no commercial use, no profanity, call sign announcement, etc.
Yes pretty much. There are a lot of digital modes for different use cases. Usually packet radio is referring to APRS. You can encode all you want as long as you make the encoding/decoding spec public and as long as the decoded information still comply with the rest of the rules like no commercial use, no profanity, call sign announcement, etc.
packet radio is never encrypted, and always uses a public protocol, yes