Mic-E message:	In service
Location:	38°55.09' N 77°34.11' W - ตำแหน่ง FM18FW10SI - show map 8.2 km ตะวันออก bearing 79° มาจาก Bull Run Mountain Estates, Prince William County, Virginia, United States [?] 13.2 km ตะวันออกเฉียงเหนือ bearing 26° มาจาก Haymarket, Prince William County, Virginia, United States 46.1 km ตะวันตก bearing 273° มาจาก Washington, D. C., Washington, D.C., United States 92.3 km ตะวันตกเฉียงใต้ bearing 244° มาจาก Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-03-31 20:00:25 UTC (78d 8h34m ago) 2025-03-31 16:00:25 EDT เวลาท้องถิ่น Bull Run Mountain Estates, United States [?]
Altitude:	144 m
Course:	0°
ความเร็ว:	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.