Location:	38°51.52' N 77°09.90' W - locator FM18KU06EB - show map 1.4 km Northwest bearing 326° from Lake Barcroft, Fairfax County, Virginia, United States [?] 4.8 km Northwest bearing 337° from Lincolnia, Fairfax County, Virginia, United States 11.8 km West bearing 250° from Washington, D. C., Washington, D.C., United States 67.6 km Southwest bearing 225° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-07-10 00:22:09 UTC (5d 8h58m ago) 2025-07-09 20:22:09 EDT local time at Lake Barcroft, United States [?]
Altitude:	85 m
Device:	Icom: IC-5100 (D-Star)
Last path:	W4JJ-9>API510 via DSTAR*,qAR,W4HFH-C
Positions stored:	1670
Other SSIDs:	W4JJ-7 W4JJ-D W4JJ W4JJ-N W4JJ-B W4JJ-C

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.