Source callsign:	NV4FM-S
Comment:	440 Voice 448.035 -5 MHz
Location:	38°54.32' N 77°12.96' W - locator FM18JV47BG - show map 4.6 km Southwest bearing 226° from McLean, Fairfax County, Virginia, United States [?] 9.3 km Southwest bearing 213° from Cabin John, Montgomery County, Maryland, United States 15.6 km West bearing 274° from Washington, D. C., Washington, D.C., United States 67.4 km Southwest bearing 231° from Baltimore, City of Baltimore, Maryland, United States
Last position:	2025-07-23 05:43:35 UTC (37m35s ago) 2025-07-23 01:43:35 EDT local time at McLean, United States [?]
Last path:	NV4FM-S>APJIO4 via TCPIP*,qAC,NV4FM-GS
Positions stored:	2
Others sourced by NV4FM-S:	NV4FM A NV4FM AD NV4FM C

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.