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 KO4OUX-9 - show graphs
Comment: 147.135MHz T156 +060 Don't give up the ship!
Mic-E message: En route
Location: 39°01.15' N 76°43.55' W - locator FM19PA24VO - show map
3.8 km Northwest bearing 300° from Crofton, Anne Arundel County, Maryland, United States [?]
7.5 km Southwest bearing 225° from Gambrills, Anne Arundel County, Maryland, United States
30.2 km Northeast bearing 63° from Washington, D. C., Washington, D.C., United States
31.7 km South bearing 198° from Baltimore, City of Baltimore, Maryland, United States
Last position: 2025-10-31 18:18:19 UTC (5d 2h21m ago)
2025-10-31 14:18:19 EDT local time at Crofton, United States [?]
Altitude: 42 m
Position ambiguous: Precision reduced at transmitter by 1 digits, position resolution approximately 185.0 m.
Course: 262°
Speed: 13 km/h
Device: Yaesu: FTM-500D (rig)
Last path: KO4OUX-9>SY0Q1Z via WIDE1-1,WIDE2-1,qAR,KZ3VEA-10 (good)
Positions stored: 13272
Other SSIDs: KO4OUX-7 KO4OUX-i
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