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 N4SZT-4 - show graphs
Mic-E message: Off duty
Location: 38°50.98' N 77°26.45' W - locator FM18GU73CW - show map
1.5 km Northwest bearing 315° from Centreville, Fairfax County, Virginia, United States [?]
8.0 km Northeast bearing 38° from Sudley, Prince William County, Virginia, United States
35.4 km West bearing 262° from Washington, D. C., Washington, D.C., United States
86.7 km Southwest bearing 236° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2026-01-04 16:40:08 UTC (9h22m ago)
2026-01-04 11:40:08 EST local time at Centreville, United States [?]
Altitude: 91 m
Course: 303°
Speed: 61 km/h
Device: Yaesu: FTM-510D (rig)
Last path: N4SZT-4>SXUP9X via N4CV-2,WIDE1,W4VA-13,WIDE2*,qAR,KG4GIY (good)
Positions stored: 82
Other SSIDs: N4SZT N4SZT-B
Stations which heard N4SZT-4 directly on radio –
callsign pkts first heard - UTC last heard longest (tx => rx) longest at - UTC

Only position packets which were originated by the station are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
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