Location:	51°32.94' N 7°19.07' E - locator JO31PN81DS - show map 137.0 m Southeast bearing 144° from Castrop-Rauxel, North Rhine-Westphalia, Germany [?] 7.0 km East bearing 91° from Herne, North Rhine-Westphalia, Germany 23.6 km Northeast bearing 62° from Essen, North Rhine-Westphalia, Germany 73.0 km North bearing 20° from Köln (Koeln), Regierungsbezirk Köln, North Rhine-Westphalia, Germany
Last position:	2025-11-05 14:49:36 UTC (5h39m ago) 2025-11-05 15:49:36 CET local time at Castrop-Rauxel, Germany [?]
Device:	Icom: IC-51 (D-Star)
Last path:	DO4SEM>API51 via TCPIP*,qAC,T2LEIPZIG
Positions stored:	84
Other SSIDs:	DO4SEM-N DO4SEM-B DO4SEM-R DO4SEM-D

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.