Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station ZS4PR-4 - show graphs
Comment: 61C 1Mv 3.99V In 13.24V 51kmh
Last status: LTE A7670E V9.15q m EngData: 1h 11r Vbat=4.01V Vbus=4.91V Vign=13.23V
Location: 26°47.47' S 27°50.54' E - locator KG33WF10BC - show map
3.5 km Northeast bearing 45° from Sasolburg, Free State, South Africa [?]
8.8 km South bearing 177° from Vanderbijlpark, Gauteng, South Africa
58.2 km South bearing 182° from Soweto, Gauteng, South Africa
68.4 km South bearing 197° from Johannesburg, Gauteng, South Africa
Last position: 2026-02-04 11:24:12 UTC (11s ago)
2026-02-04 13:24:12 SAST local time at Sasolburg, South Africa [?]
Altitude: 1500 m
Course: 347°
Speed: 50 km/h
Device: ZS6EY: EYTraker (tracker)
Last path: ZS4PR-4>APCLEY via TCPIP*,qAC,APRS-ZA
Positions stored: 151012
Other SSIDs: ZS4PR-3 ZS4PR-12 ZS4PR ZS4PR-9 ZS4PR-1 ZS4PR-5 ZS4PR-15 ZS4PR-7 ZS4PR-10 ZS4PR-14
About this site
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.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS