Mic-E message:	In service
Location:	38°55.09' N 77°34.11' W - locator FM18FW10SI - show map 5.6 km West bearing 267° from South Riding, Loudoun County, Virginia, United States [?] 7.6 km South bearing 200° from Brambleton, Loudoun County, Virginia, United States 46.1 km West bearing 273° from Washington, D. C., Washington, D.C., United States 92.3 km Southwest bearing 244° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-03-31 20:00:25 UTC (45d 22h25m ago) 2025-03-31 16:00:25 EDT local time at South Riding, United States [?]
Altitude:	144 m
Course:	0°
Speed:	0 km/h
Device:	Yaesu: FTM-500D (rig)
Last path:	W4BTK>S8UU0Y via N4CV-2,WIDE1,KN4IJF-1,WIDE2*,qAR,W4VA-13
Positions stored:	184
Other SSIDs:	W4BTK-9 W4BTK-N

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.