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 KV4S-9 - show graphs
Comment: 444.700MHz T156 +500 APMAIL http://KV4S.radio FTM-510
Mic-E message: Off duty
Location: 33°20.21' N 86°36.86' W - locator EM63QI60GU - show map
1.5 km East bearing 104° from Chelsea, Shelby County, Alabama, United States [?]
7.4 km West bearing 259° from Westover, Shelby County, Alabama, United States
26.9 km Southeast bearing 139° from Birmingham, Jefferson County, Alabama, United States
111.7 km North bearing 345° from Montgomery, Montgomery County, Alabama, United States
Last position: 2026-01-01 00:36:33 UTC (31d 20h54m ago)
2025-12-31 18:36:33 CST local time at Chelsea, United States [?]
Course:
Speed: 0 km/h
Device: Yaesu: FTM-510D (rig)
Last path: KV4S-9>SSRP2Q via WIDE1-1,WIDE2-1,qAR,KV4S-2 (good)
Positions stored: 6423
Other SSIDs: KV4S-1 KV4S-7 KV4S-2 KV4S KV4S-4 KV4S-10 KV4S-12
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