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*
Web station AC3JM-1 - show graphs
Location: 39°18.80' N 77°20.30' W - locator FM19HH95JE - show map
1.8 km Southeast bearing 141° from Urbana, Frederick County, Maryland, United States [?]
3.6 km West bearing 277° from Green Valley, Frederick County, Maryland, United States
53.3 km Northwest bearing 331° from Washington, D. C., Washington, D.C., United States
62.5 km West bearing 273° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2024-07-11 14:18:24 UTC (5d 1h49m ago)
2024-07-11 10:18:24 EDT local time at Urbana, United States [?]
Altitude: 133 m
Position ambiguous: Precision reduced at transmitter by 1 digits, position resolution approximately 185.0 m.
Speed: 0 km/h
Last path: AC3JM-1>aprs.fi via aprsfi-iOS
Positions stored: 4999
Other SSIDs: AC3JM-7 AC3JM-12 AC3JM-9 AC3JM-10 AC3JM-9
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