Callsign:	WDL4230
MMSI number:	366918840
Vessel class:	Fishing (30)
Location:	37°49.59' N 122°28.58' W - locator CM87ST28UI - show map 5.2 km South bearing 192° from Belvedere, Marin County, California, United States [?] 5.5 km South bearing 198° from Tiburon, Marin County, California, United States 7.6 km Northwest bearing 319° from San Francisco, San Francisco County, California, United States 74.5 km Northwest bearing 317° from San Jose, Santa Clara County, California, United States
Last position:	2025-10-18 23:34:52 UTC (4d 12h22m ago) 2025-10-18 16:34:52 PDT local time at Belvedere, United States [?]
Course:	34° – heading 511°
Speed:	13 km/h
Last path:	WDL4230>ais via SUNSET
Positions stored:	840

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.