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 W1TJF-4 - show graphs
Comment: aprs.fi for iOS
Location: 42°26.74' N 71°03.97' W - locator FN42LK26BX - show map
4.7 km Southeast bearing 144° from Stoneham, Middlesex County, Massachusetts, United States [?]
6.8 km South bearing 175° from Wakefield, Middlesex County, Massachusetts, United States
9.7 km North bearing 357° from Boston, Suffolk County, Massachusetts, United States
12.6 km North bearing 354° from South Boston, Suffolk County, Massachusetts, United States
Last position: 2025-06-10 01:37:52 UTC (23d 15h13m ago)
2025-06-09 21:37:52 EDT local time at Stoneham, United States [?]
Course: 40°
Speed: 0 km/h
Device: aprs.fi: iPhone/iPad app (app, ios)
Last path: W1TJF-4>APFII0 via WIDE1-1,WIDE2-1,qAR,W1XM (good)
Positions stored: 2
Other SSIDs: W1TJF-i W1TJF-7
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