Callsign:	WDM3329
MMSI number:	368196320
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	LANGLEY (ETA May27 04:21)
Location:	37°49.52' N 122°28.45' W - locator CM87ST38CB - show map 5.3 km South bearing 189° from Belvedere, Marin County, California, United States [?] 5.6 km South bearing 196° from Tiburon, Marin County, California, United States 7.4 km Northwest bearing 319° from San Francisco, San Francisco County, California, United States 74.3 km Northwest bearing 317° from San Jose, Santa Clara County, California, United States
Last position:	2025-07-28 01:22:08 UTC (57m38s ago) 2025-07-27 18:22:08 PDT local time at Belvedere, United States [?]
Course:	50.099998474121° – heading 47°
Speed:	18 km/h
Dimensions:	length 30 m width 10 m draught 5.0 m
Last path:	WDM3329>ais via SUNSET
Positions stored:	17373

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.