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 K4TCK-1 - show graphs
Mic-E message: Off duty
Location: 37°22.41' N 122°04.93' W - locator CM87XI09DP - show map
9.3 km Southeast bearing 145° from Palo Alto, Santa Clara County, California, United States [?]
11.8 km Southeast bearing 154° from East Palo Alto, San Mateo County, California, United States
17.0 km West bearing 283° from San Jose, Santa Clara County, California, United States
53.6 km Southeast bearing 146° from San Francisco, San Francisco County, California, United States
Last position: 2025-04-10 16:32:43 UTC (28d 19h55m ago)
2025-04-10 09:32:43 PDT local time at Palo Alto, United States [?]
Altitude: 23 m
Course: 84°
Speed: 26 km/h
Device: Yaesu: FTM-400DR (rig)
Last path: K4TCK-1>SWRRTQ via WIDE1-1,WIDE2-1,qAO,AI6SL-5 (good)
Positions stored: 570
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