Source callsign:	WB6DTB-S
Comment:	440 Voice 431.00000MHz +0.0005MHz
Location:	37°59.37' N 121°44.20' W - locator CM97DX17OL - show map 6.4 km West bearing 291° from Knightsen, Contra Costa County, California, United States [?] 7.0 km North bearing 352° from Brentwood, Contra Costa County, California, United States 64.5 km East bearing 68° from San Francisco, San Francisco County, California, United States 73.6 km North bearing 11° from San Jose, Santa Clara County, California, United States
Last position:	2025-06-06 06:53:02 UTC (4m15s ago) 2025-06-05 23:53:02 PDT local time at Knightsen, United States [?]
Last path:	WB6DTB-S>APDG01 via TCPIP*,qAC,WB6DTB-GS
Positions stored:	1918

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.