Location:	38°51.96' N 77°08.09' W - locator FM18KU37TU - show map 1.9 km East bearing 111° from Seven Corners, Fairfax County, Virginia, United States [?] 3.1 km Southwest bearing 238° from Arlington, Arlington County, Virginia, United States 9.1 km West bearing 249° from Washington, D. C., Washington, D.C., United States 65.2 km Southwest bearing 224° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-12-04 01:13:18 UTC (83d 11h38m ago) 2025-12-03 20:13:18 EST local time at Seven Corners, United States [?]
Altitude:	77 m
Device:	Icom: IC-5100 (D-Star)
Last path:	W4JJ-9>API510 via DSTAR*,qAR,W4HFH-C
Positions stored:	1671
Other SSIDs:	W4JJ-D W4JJ-7 W4JJ

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.