Callsign:	WDL8355
MMSI number:	368168710
Vessel class:	Sailing (36)
Location:	37°48.51' N 122°29.76' W - locator CM87ST04LA - show map 7.7 km Northwest bearing 299° from San Francisco, San Francisco County, California, United States [?] 8.5 km Southeast bearing 155° from Tamalpais-Homestead Valley, Marin County, California, United States 11.7 km South bearing 158° from Mill Valley, Marin County, California, United States 74.3 km Northwest bearing 315° from San Jose, Santa Clara County, California, United States
Last position:	2025-07-26 21:29:18 UTC (13h27m ago) 2025-07-26 14:29:18 PDT local time at San Francisco, United States [?]
Course:	61.299999237061° – heading 55°
Speed:	16 km/h
Last path:	WDL8355>ais via SUNSET
Positions stored:	1043

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.