Callsign:	WDK4179
MMSI number:	368052630
Navigational status:	Undefined/default (15)
Vessel class:	Passenger (60)
Destination:	USSEA>USSFO43.5 (ETA Sep07 16:00)
Location:	37°49.19' N 122°26.35' W - locator CM87ST76HS - show map 5.3 km North bearing 341° from San Francisco, San Francisco County, California, United States [?] 6.2 km South bearing 166° from Tiburon, Marin County, California, United States 6.3 km South bearing 159° from Belvedere, Marin County, California, United States 71.7 km Northwest bearing 318° from San Jose, Santa Clara County, California, United States
Last position:	2025-07-21 03:36:16 UTC (3d 5h36m ago) 2025-07-20 20:36:16 PDT local time at San Francisco, United States [?]
Course:	92° – heading 92°
Speed:	19 km/h
Dimensions:	length 42 m width 10 m draught 2.0 m
Last path:	WDK4179>ais via SUNSET
Positions stored:	50404

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.