Callsign:	WDM3133
MMSI number:	368194460
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	SEATTLE (ETA Jun16 20:00)
Location:	37°46.53' N 122°22.57' W - locator CM87TS46UC - show map 3.8 km East bearing 89° from San Francisco, San Francisco County, California, United States [?] 10.8 km Northeast bearing 44° from Daly City, San Mateo County, California, United States 64.4 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2025-11-21 15:36:13 UTC (10d 14h49m ago) 2025-11-21 07:36:13 PST local time at San Francisco, United States [?]
Course:	155° – heading 152°
Speed:	17 km/h
Dimensions:	length 30 m width 11 m draught 3.5 m
Last path:	WDM3133>ais via AA6CE
Positions stored:	26405

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.