Callsign:	338476991
MMSI number:	338476991
Location:	37°50.25' N 122°24.95' W - locator CM87TU01CA - show map 5.4 km Southeast bearing 138° from Tiburon, Marin County, California, United States [?] 5.8 km Southeast bearing 133° from Belvedere, Marin County, California, United States 7.0 km North bearing 3° from San Francisco, San Francisco County, California, United States 71.9 km Northwest bearing 321° from San Jose, Santa Clara County, California, United States
Last position:	2025-07-02 20:29:10 UTC (23d 12h3m ago) 2025-07-02 13:29:10 PDT local time at Tiburon, United States [?]
Course:	92° – heading 511°
Speed:	12 km/h
Last path:	338476991>ais via SUNSET
Positions stored:	13

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.