Callsign:	WDK4179
MMSI number:	368052630
Navigational status:	Undefined/default (15)
Vessel class:	Passenger (60)
Destination:	USSEA>USSFO43.5 (ETA Sep07 16:00)
Location:	37°48.75' N 122°25.04' W - locator CM87ST95WA - show map 4.2 km North bearing 3° from San Francisco, San Francisco County, California, United States [?] 7.6 km Southeast bearing 153° from Tiburon, Marin County, California, United States 7.9 km Southeast bearing 148° from Belvedere, Marin County, California, United States 69.9 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2025-08-08 03:51:36 UTC (2h16m ago) 2025-08-07 20:51:36 PDT local time at San Francisco, United States [?]
Course:	230.80000305176° – heading 232°
Speed:	16 km/h
Dimensions:	length 42 m width 10 m draught 2.0 m
Last path:	WDK4179>ais via SUNSET
Positions stored:	50769

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.