Comment:	144.390MHz TOFF
Location:	38°49.72' N 77°14.98' W - locator FM18JT08AV - show map 4.7 km Northwest bearing 305° from North Springfield, Fairfax County, Virginia, United States [?] 7.0 km Northwest bearing 309° from Springfield, Fairfax County, Virginia, United States 19.9 km West bearing 248° from Washington, D. C., Washington, D.C., United States 75.2 km Southwest bearing 227° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-08-12 17:08:37 UTC (19d 9h35m ago) 2025-08-12 13:08:37 EDT local time at North Springfield, United States [?]
Device:	KA2DDO: YAAC (software)
Last path:	W4MRA>APJYC1 via qAR,K4TEZ
Positions stored:	9
Other SSIDs:	W4MRA-9 W4MRA-1

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.