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 WB9SLI-7 - show graphs
Comment: N9638Y 3.92V +23,6C TF
Location: 45°51.04' N 89°52.02' W - locator EN55BU54XD - show map
13.4 km South bearing 172° from Lac du Flambeau, Vilas County, Wisconsin, United States [?]
42.5 km Northwest bearing 304° from Rhinelander, Oneida County, Wisconsin, United States
100.8 km North bearing 350° from Wausau, Marathon County, Wisconsin, United States
109.5 km North bearing 347° from Weston, Marathon County, Wisconsin, United States
Last position: 2025-08-26 22:48:22 UTC (22d 9h43m ago)
2025-08-26 17:48:22 CDT local time at Lac du Flambeau, United States [?]
Altitude: 1505 m
Course: 78°
Speed: 252 km/h
Device: SainSonic: AP510 (tracker)
Last path: WB9SLI-7>APAVT5 via N9MEA-14,WIDE1,SPNR,WIDE2*,qAR,N9MEC-8 (seriously-bad)
This station appears to be flying at high altitude and using digipeaters, which causes serious congestion in the APRS network. The tracker should be configured to only use digipeaters when at low altitude.
Positions stored: 47
Other SSIDs: WB9SLI-C WB9SLI WB9SLI-B
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