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*
Web station YO4FRF-1 - show graphs
Comment: aprs.fi for iOS || www.OmnisMares.com
Location: 50°05.16' N 14°25.04' E - locator JO70FC00BP - show map
233.4 m Southwest bearing 242° from Staré Město, Hlavní Mesto Praha, Czech Republic [?]
331.1 m Southwest bearing 227° from Prague, Hlavní Mesto Praha, Czech Republic
936.0 m East bearing 102° from Malá Strana, Hlavní Mesto Praha, Czech Republic
117.4 km Southeast bearing 156° from Dresden, Direktionsbezirk Dresden, Saxony, Germany
Last position: 2025-12-27 16:48:26 UTC (4h1m ago)
2025-12-27 17:48:26 CET local time at Staré Město, Czech Republic [?]
Altitude: 190 m
Speed: -4 km/h
Last path: YO4FRF-1>aprs.fi via aprsfi-iOS
Positions stored: 1646
Other SSIDs: YO4FRF-7 YO4FRF-10 YO4FRF-5 YO4FRF-6 YO4FRF YO4FRF-8
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