Callsign:	WDH9893
MMSI number:	367672630
Vessel class:	Sailing (36)
Location:	37°49.78' N 122°28.44' W - locator CM87ST39CD - show map 4.9 km South bearing 190° from Belvedere, Marin County, California, United States [?] 5.1 km South bearing 197° from Tiburon, Marin County, California, United States 7.7 km Northwest bearing 322° from San Francisco, San Francisco County, California, United States 74.6 km Northwest bearing 317° from San Jose, Santa Clara County, California, United States
Last position:	2025-10-12 23:16:18 UTC (10d 10h32m ago) 2025-10-12 16:16:18 PDT local time at Belvedere, United States [?]
Course:	34° – heading 511°
Speed:	11 km/h
Last path:	WDH9893>ais via SUNSET
Positions stored:	146

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.