Callsign:	338493843
MMSI number:	338493843
Vessel class:	Sailing (36)
Location:	37°50.18' N 122°27.98' W - locator CM87SU40AR - show map 4.2 km South bearing 192° from Tiburon, Marin County, California, United States [?] 8.0 km Northwest bearing 329° from San Francisco, San Francisco County, California, United States 74.7 km Northwest bearing 318° from San Jose, Santa Clara County, California, United States
Last position:	2025-07-31 03:40:11 UTC (5d 13h36m ago) 2025-07-30 20:40:11 PDT local time at Tiburon, United States [?]
Course:	307° – heading 511°
Speed:	7 km/h
Last path:	338493843>ais via SUNSET
Positions stored:	94

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.