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 WZ4CH - show graphs
Comment: https://aprsdroid.org/
Location: 34°45.00' N 86°35.00' W - locator EM64RS00AA - show map
2.2 km North bearing 7° from Huntsville, Madison County, Alabama, United States [?]
9.4 km Northeast bearing 39° from Redstone Arsenal, Madison County, Alabama, United States
120.6 km West bearing 255° from Chattanooga, Hamilton County, Tennessee, United States
Last position: 2025-12-21 20:38:26 UTC (7d 21h19m ago)
2025-12-21 14:38:26 CST local time at Huntsville, United States [?]
Altitude: 164 m
Position ambiguous: Precision reduced at transmitter by 3 digits, position resolution approximately 18.5 km.
Device: Open Source: APRSdroid (app, Android)
Last path: WZ4CH>APDR16 via TCPIP*,qAC,T2EDM
Positions stored: 9
Other SSIDs: WZ4CH-9 WZ4CH-11 WZ4CH-1 WZ4CH-5 WZ4CH-10
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