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 KK4YOS-4 - show graphs
Comment: aprs.fi for iOS
Location: 39°16.60' N 77°19.30' W - locator FM19IG16JJ - show map
4.2 km Southwest bearing 210° from Green Valley, Frederick County, Maryland, United States [?]
5.6 km Northwest bearing 319° from Clarksburg, Montgomery County, Maryland, United States
49.0 km Northwest bearing 330° from Washington, D. C., Washington, D.C., United States
61.0 km West bearing 269° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2024-05-12 20:53:44 UTC (273d 19h45m ago)
2024-05-12 16:53:44 EDT local time at Green Valley, United States [?]
Course: 147°
Speed: 26 km/h
Device: aprs.fi: iPhone/iPad app (app, ios)
Last path: KK4YOS-4>APFII0 via N3KTX-2*,WIDE1,WIDE2-1,qAO,W4TTU-10 (good)
Positions stored: 141
Other SSIDs: KK4YOS-9 KK4YOS-9 KK4YOS
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