Comment:	146.520MHz listening
Mic-E message:	In service
Location:	38°39.27' N 77°16.86' W - locator FM18IP67GB - show map 1.5 km Northeast bearing 50° from Potomac Mills, Prince William County, Virginia, United States [?] 4.0 km South bearing 159° from Lake Ridge, Prince William County, Virginia, United States 34.1 km Southwest bearing 218° from Washington, D. C., Washington, D.C., United States 91.3 km Southwest bearing 219° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-12-02 14:23:10 UTC (30d 10h22m ago) 2025-12-02 09:23:10 EST local time at Potomac Mills, United States [?]
Altitude:	66 m
Course:	202°
Speed:	91 km/h
Device:	Yaesu: FTM-400DR (rig)
Last path:	W4MRW-9>S8SY2W via qAR,W4KEL-12
Positions stored:	976
Other SSIDs:	W4MRW-i

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.