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 KA9GFZ-1 - show graphs
Mic-E message: In service
Location: 42°21.45' N 88°02.65' W - locator EN52XI45QT - show map
1.5 km North bearing 352° from Grayslake, Lake County, Illinois, United States [?]
2.4 km Northeast bearing 55° from Hainesville, Lake County, Illinois, United States
65.1 km Northwest bearing 330° from Chicago, Cook County, Illinois, United States
76.5 km South bearing 188° from Milwaukee, Milwaukee County, Wisconsin, United States
Last position: 2025-06-23 01:00:32 UTC (10d 17h7m ago)
2025-06-22 20:00:32 CDT local time at Grayslake, United States [?]
Altitude: 233 m
Position ambiguous: Precision reduced at transmitter by 1 digits, position resolution approximately 185.0 m.
Course: 90°
Speed: 6 km/h
Device: Yaesu: FT5D (ht)
Last path: KA9GFZ-1>T2RQ4Z via WIDE1-1,WIDE2-1,qAO,KB9OIV-2 (good)
Positions stored: 43
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