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 WC4J-14 - show graphs
Comment: NCC-1701A
Mic-E message: In service
Last beacon: WC4J/R
Location: 38°47.57' N 77°32.69' W - locator FM18FT40OG - show map
11.3 km Southwest bearing 242° from Centreville, Fairfax County, Virginia, United States [?]
15.4 km Southwest bearing 234° from Greenbriar, Fairfax County, Virginia, United States
45.4 km West bearing 256° from Washington, D. C., Washington, D.C., United States
97.7 km Southwest bearing 236° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2025-12-29 19:53:59 UTC (2d 5h55m ago)
2025-12-29 14:53:59 EST local time at Centreville, United States [?]
Altitude: 90 m
Course: 90°
Speed: 59 km/h
Device: Kenwood: TM-D700 (rig)
Last path: WC4J-14>S8TW5W via N4CV-2,WIDE1,W4VA-13,WIDE2*,qAR,KG4GIY (good)
Positions stored: 138347
Other SSIDs: WC4J WC4J-9
Last heard a station directly: 2025-12-19 18:17:57 UTC (12d 7h31m ago)
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