Callsign:	WDM6878
MMSI number:	367581220
IMO number:	694323
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	SHIP ASSIST TUG
Location:	37°47.05' N 122°22.37' W - locator CM87TS58GE - show map 4.2 km East bearing 76° from San Francisco, San Francisco County, California, United States [?] 11.7 km Northeast bearing 42° from Daly City, San Mateo County, California, United States 64.9 km Northwest bearing 320° from San Jose, Santa Clara County, California, United States
Last position:	2025-11-27 15:37:50 UTC (5d 4h50m ago) 2025-11-27 07:37:50 PST local time at San Francisco, United States [?]
Course:	159° – heading 164°
Speed:	18 km/h
Dimensions:	length 33 m width 13 m draught 5.7 m
Last path:	WDM6878>ais via AA6CE
Positions stored:	3966

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.