Source callsign:	GB7ZP-S
Comment:	440 Voice 439.4875 -9.00 MHz
Location:	51°45.86' N 0°29.69' E - lokaator JO01FS93JK - show map 3.6 km Kirdesse peiling 29° from Chelmsford, Essex, England, United Kingdom [?] 6.0 km Kirdesse peiling 49° from Writtle, Essex, England, United Kingdom 49.2 km Kirdesse peiling 55° from City of London, Greater London, England, United Kingdom 51.4 km Kirdesse peiling 56° from London, Greater London, England, United Kingdom
Last position:	2025-06-29 13:47:31 UTC (64d 9h3m ago) 2025-06-29 14:47:31 BST local time at Chelmsford, United Kingdom [?]
Last path:	GB7ZP-S>APJIO4 via TCPIP*,qAC,GB7ZP-GS
Positions stored:	391

This page shows real-time information collected from the Automatic Position Reporting System Internet network (APRS-IS). APRS is used by amateur (ham) radio operators to transmit real-time position information, weather data, telemetry and messages over the radio. A vehicle equipped with a GPS receiver, a VHF transmitter or HF transceiver and a small computer device called a tracker transmits it's location, speed and course in a small data packet, which is then received by a nearby iGate receiving site which forwards the packet on the Internet. Systems connected to the Internet can send information on the APRS-IS without a radio transmitter, or collect and display information transmitted anywhere in the world.