Location:	39°21.34' N 77°13.08' W - locator FM19JI35UI - show map 12.6 km Southeast bearing 114° from Spring Ridge, Frederick County, Maryland, United States [?] 12.7 km East bearing 109° from Bartonsville, Frederick County, Maryland, United States 52.6 km West bearing 278° from Baltimore, City of Baltimore, Maryland, United States 53.5 km North bearing 343° from Washington, D. C., Washington, D.C., United States
Last position:	2025-11-08 16:31:50 UTC (44d 9h39m ago) 2025-11-08 11:31:50 EST local time at Spring Ridge, United States [?]
Altitude:	230 m
Device:	Icom: IC-51 (D-Star)
Last path:	N3RTX>API51 via DSTAR*,qAS,OM2ABC-G
Positions stored:	713

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.