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 KS1G-4 - show graphs
Comment: 145.31 T77.0
Mic-E message: In service
Location: 38°59.93' N 77°23.14' W - locator FM18HX39RR - show map
2.3 km Northeast bearing 44° from Oak Grove, Loudoun County, Virginia, United States [?]
3.4 km West bearing 267° from Dranesville, Fairfax County, Virginia, United States
32.3 km West bearing 291° from Washington, D. C., Washington, D.C., United States
74.1 km Southwest bearing 244° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2026-01-22 22:48:03 UTC (9d 21h6m ago)
2026-01-22 17:48:03 EST local time at Oak Grove, United States [?]
Altitude: 103 m
Course: 62°
Speed: 26 km/h
Device: Kenwood: TM-D710 (rig)
Last path: KS1G-4>S8UY9S via WIDE1-1,WIDE2-1,qAR,KG4RRL-10 (good)
Positions stored: 50595
Other SSIDs: KS1G KS1G-9 KS1G-2 KS1G-15
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