Comment:	aprs.fi iOS
Location:	38°39.00' N 77°21.00' W - locator FM18HP86AA - show map 4.4 km North bearing 348° from Montclair, Prince William County, Virginia, United States [?] 7.8 km East bearing 78° from Independent Hill, Prince William County, Virginia, United States 38.5 km Southwest bearing 225° from Washington, D. C., Washington, D.C., United States 95.5 km Southwest bearing 222° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-10-31 00:09:34 UTC (3d 21h3m ago) 2025-10-30 20:09:34 EDT local time at Montclair, United States [?]
Position ambiguous:	Precision reduced at transmitter by 2 digits, position resolution approximately 1.9 km.
Course:	144°
Speed:	444 km/h
Last path:	KF4YHC-7>aprs.fi via aprsfi-iOS
Positions stored:	2
Other SSIDs:	KF4YHC-2 KF4YHC KF4YHC-1 KF4YHC-10

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.