Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
APRS station 4PN3GXH-9 - show graphs
Mic-E message: In service
Location: 39°23.27' N 76°44.27' W - locator FM19PJ13LB - show map
5.2 km Northeast bearing 32° from Milford Mill, Baltimore County, Maryland, United States [?]
5.4 km Northeast bearing 65° from Randallstown, Baltimore County, Maryland, United States
15.3 km Northwest bearing 315° from Baltimore, City of Baltimore, Maryland, United States
60.5 km Northeast bearing 25° from Washington, D. C., Washington, D.C., United States
Last position: 2025-08-25 19:05:45 UTC (6d 19h44m ago)
2025-08-25 15:05:45 EDT local time at Milford Mill, United States [?]
Altitude: 165 m
Course: 44°
Speed: 0 km/h
Device: Kenwood: TM-D710 (rig)
Last path: 4PN3GXH-9>S9RS2W via N3KTX-1,WIDE1*,WIDE2-1,qAR,N3JAS (good)
Positions stored: 42
About this site
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.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS