Callsign:	WDK4744
MMSI number:	367309280
IMO number:	826908
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	US^0TDK>?? ???
Location:	37°46.49' N 122°22.99' W - locator CM87TS45AW - show map 3.2 km East bearing 90° from San Francisco, San Francisco County, California, United States [?] 10.3 km Northeast bearing 42° from Daly City, San Mateo County, California, United States 64.7 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2025-11-28 17:38:35 UTC (3d 5h33m ago) 2025-11-28 09:38:35 PST local time at San Francisco, United States [?]
Course:	208° – heading 269°
Speed:	0 km/h
Dimensions:	length 31 m width 10 m draught 0.0 m
Last path:	WDK4744>ais via AA6CE
Positions stored:	967

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.