Callsign:	WDC9175
MMSI number:	367098550
IMO number:	360153
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	XX XXX>US^016G (ETA ***00 24:60)
Location:	37°48.65' N 122°29.75' W - locator CM87ST04LO - show map 7.8 km Northwest bearing 301° from San Francisco, San Francisco County, California, United States [?] 8.3 km Southeast bearing 155° from Tamalpais-Homestead Valley, Marin County, California, United States 11.4 km South bearing 158° from Mill Valley, Marin County, California, United States 74.5 km Northwest bearing 315° from San Jose, Santa Clara County, California, United States
Last position:	2026-01-21 08:03:13 UTC (21d 22h58m ago) 2026-01-21 00:03:13 PST local time at San Francisco, United States [?]
Course:	57° – heading 49°
Speed:	13 km/h
Dimensions:	length 39 m width 10 m draught 4.6 m
Last path:	WDC9175>ais via SUNSET
Positions stored:	46696

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.