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 OK1CMJ-1 - show graphs
Comment: W3,CZn-N,DIGI Praha Brdy ASL:860m
Location: 49°39.33' N 13°49.08' E - locator JN69VP87DH - show map
6.8 km Northwest bearing 331° from Rožmitál pod Třemšínem, Středočeský Kraj, Czech Republic [?]
9.1 km West bearing 270° from Bohutín, Středočeský Kraj, Czech Republic
33.3 km East bearing 108° from Plzeň, Plzeňský Kraj, Czech Republic
64.6 km Southwest bearing 222° from Prague, Hlavní Mesto Praha, Czech Republic
Last position: 2025-10-29 07:23:51 UTC (6d 22h6m ago)
2025-10-29 08:23:51 CET local time at Rožmitál pod Třemšínem, Czech Republic [?]
Last WX report: 2025-09-27 08:21:09 UTC (38d 21h9m ago) – show weather charts
13.9 °C 100% 1019.6 mbar 1.3 m/s Southeast
Last telemetry: 2025-10-29 08:39:51 UTC (6d 20h50m ago) – show telemetry
Avg 10m: 0.144 Rx Erlang, Avg 10m: 0.035 Tx Erlang, RxPkts: 157 count/10m, IGateDropRx: 332 count/10m, TxPkts: 35 count/10m
Device: Kenneth W. Finnegan, W6KWF: Aprx (igate, Linux/Unix)
Last path: OK1CMJ-1>APRX29 via qAR,OK1TZL
Positions stored: 39
Other SSIDs: OK1CMJ-5 OK1CMJ-15 OK1CMJ-7 OK1CMJ-12 OK1CMJ-6 OK1CMJ-14 OK1CMJ-16 OK1CMJ-10 OK1CMJ-04
Last heard a station directly: 2025-10-29 08:17:16 UTC (6d 21h13m ago)
Normal receiver range estimate: 200 km (Updated: 2025-09-30 23:13:25 UTC)
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