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 KZ4WO-7 - show graphs
Comment: R3DB3ARD on the move
Location: 34°41.35' N 86°40.35' W - locator EM64PQ95HJ - show map
2.3 km West bearing 285° from Redstone Arsenal, Madison County, Alabama, United States [?]
9.1 km Southwest bearing 240° from Huntsville, Madison County, Alabama, United States
130.4 km West bearing 253° from Chattanooga, Hamilton County, Tennessee, United States
Last position: 2025-09-22 11:52:16 UTC (22d 4h57m ago)
2025-09-22 06:52:16 CDT local time at Redstone Arsenal, United States [?]
Altitude: 169 m
Position ambiguous: Precision reduced at transmitter by 1 digits, position resolution approximately 185.0 m.
Course: 216°
Speed: 31 km/h
Device: Open Source: APRSdroid (app, Android)
Last path: KZ4WO-7>APDR16 via K4PLT-2,WIDE1*,WIDE2-1,qAR,KJ4OVR-10 (good)
Positions stored: 26
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