Digipeaters and iGates

• Digipeaters (digital repeaters) are repeaters that receive an APRS packet, decide whether to relay it (based on the path), and retransmit.
• iGates are receivers that listen for APRS packets and send it to the APRS-IS system.
• APRS-IS (Automatic Packet Reporting System – Internet Service) is an internet service that interconnects APRS networks around the world (and even into space).