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 KW4UJ - show graphs
Comment: MT-RTG
Mic-E message: In service
Location: 38°52.02' N 77°16.41' W - locator FM18IU78EB - show map
6.5 miles West bearing 282° from Lake Barcroft, Fairfax County, Virginia, United States [?]
7.8 miles Northwest bearing 296° from Lincolnia, Fairfax County, Virginia, United States
12.9 miles West bearing 261° from Washington, D. C., Washington, D.C., United States
45.9 miles Southwest bearing 231° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2024-05-19 18:02:07 EDT (261d 6h8m ago)
2024-05-19 18:02:07 EDT local time at Lake Barcroft, United States [?]
Altitude: 335 ft
Course: 46°
Speed: 0 MPH
Last telemetry: 2024-05-19 18:02:07 EDT (261d 6h8m ago) – show telemetry
Ch 1: 450, Ch 2: 635, Ch 3: 0, Ch 4: 0, Ch 5: 0
Device: Byonics: TinyTrak3 (tracker)
Last path: KW4UJ>S8UR0R via NV4FM-5,WIDE1*,WIDE2-1,qAO,KS4E-5 (good)
Positions stored: 129
Other SSIDs: KW4UJ-B KW4UJ-D
Stations near current position of KW4UJ - show more
callsign distance last heard - EST      callsign distance last heard - EST
KW4UJ B407.0 yards 53°2025-02-04 23:03:41 KW4UJ-B407.0 yards 53°2025-02-04 23:03:41
KW4UJ-D407.0 yards 53°2025-02-04 22:56:11 KD2GHN-50.5 miles 281°2025-02-04 21:43:16
AC6NN1.3 miles 228°2025-02-03 21:12:07 KA3RQR-21.4 miles 328°2025-02-04 23:08:01
KA3RQR1.4 miles 328°2025-02-04 23:07:19 FW77291.6 miles 333°2025-02-04 22:46:31
W3MAL-151.7 miles 208°2025-01-24 21:50:49 DW40922.0 miles 263°2025-02-04 22:31:25
KN4JIE-92.2 miles 161°2025-01-07 17:20:09 N3DRG B2.3 miles 239°2025-01-23 20:29:51
N3DRG-B2.3 miles 239°2025-01-23 20:30:01 N3DRG-D2.3 miles 239°2025-01-31 21:10:16
EW90672.3 miles 11°2025-02-04 23:08:15 GW42893.1 miles 259°2025-02-04 23:05:18
GW30313.4 miles 7°2025-02-04 23:00:58 FW29823.5 miles 308°2025-02-04 23:09:19
KC3WDO-113.6 miles 100°2025-02-04 22:21:40 NT8B-103.9 miles 64°2025-02-04 22:42:00
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