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 K4IRV-7 - show graphs
Mic-E message: Off duty
Location: 35°02.90' N 85°22.61' W - locator EM75HB41SO - show map
6.1 km West bearing 273° from Chattanooga, Hamilton County, Tennessee, United States [?]
6.5 km Northwest bearing 337° from Lookout Mountain, Hamilton County, Tennessee, United States
115.7 km East bearing 72° from Huntsville, Madison County, Alabama, United States
Last position: 2025-10-31 21:48:31 UTC (3d 22h3m ago)
2025-10-31 17:48:31 EDT local time at Chattanooga, United States [?]
Altitude: 460 m
Course: 45°
Speed: 59 km/h
Last path: K4IRV-7>SUPR9P via WIDE1-1,WIDE2-1,qAR,KA4J-3 (good)
Positions stored: 2044
Other SSIDs: K4IRV-2 K4IRV K4IRV-2 K4IRV-9 K4IRV-9 K4IRV-4 K4IRV-1 K4IRV-5
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