Comment:	aprs.fi for iOS
Location:	38°50.31' N 77°25.66' W - locator FM18GU81QF - show map 233.9 m Southeast bearing 151° from Centreville, Fairfax County, Virginia, United States [?] 7.9 km Northeast bearing 50° from Sudley, Prince William County, Virginia, United States 34.4 km West bearing 260° from Washington, D. C., Washington, D.C., United States 86.4 km Southwest bearing 235° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-09-20 13:41:03 UTC (6d 5h41m ago) 2025-09-20 09:41:03 EDT local time at Centreville, United States [?]
Altitude:	116 m
Speed:	0 km/h
Last path:	KZ4IK-4>aprs.fi via aprsfi-iOS
Positions stored:	435
Other SSIDs:	KZ4IK-10 KZ4IK-7 KZ4IK-9 KZ4IK-8 KZ4IK-11 KZ4IK-5 KZ4IK-N KZ4IK-Y KZ4IK-3

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.