Callsign:	WDK4179
MMSI number:	368052630
Navigational status:	Undefined/default (15)
Vessel class:	Passenger (60)
Location:	37°46.68' N 122°23.07' W - locator CM87TS36UR - show map 3.1 km East bearing 83° from San Francisco, San Francisco County, California, United States [?] 10.4 km West bearing 254° from Oakland, Alameda County, California, United States 65.1 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2026-02-21 02:17:29 UTC (4d 11h58m ago) 2026-02-20 18:17:29 PST local time at San Francisco, United States [?]
Course:	59° – heading 56°
Speed:	15 km/h
Dimensions:	length 42 m width 10 m draught 0.0 m
Last path:	WDK4179>ais via AA6CE
Positions stored:	53102

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.