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this is my Kenwood THD 74 handheld ham radio and today Im gonna send and receive SMS text messages with it no cell phone no connection to a computer just the radio this is gonna be fun lets get going APRs our automatic packet reporting system is a system hams used to send data packets back and forth with or without the internet the packets include your callsign GPS data including speed and altitude a symbol representing what kind of station youre operating whether its a boat a car a home station and it can include a message over the years hams have built up APRs infrastructure consisting of I gates and digi Peters I gates receive data packets and put them on the Internet digi Peters do that as well as send packets so they can repeat packets to extend the range of a handheld like this or if a if a message is addressed to me a digi Peter if Im within range of it can send me that message in addition to land-based I gates and digi Peters there are a couple low-earth orbit satellites