Callsign:	WDA4337
MMSI number:	366808340
Navigational status:	Moored (5)
Vessel class:	Pilot (50)
Location:	37°48.41' N 122°23.60' W - locator CM87TT23TO - show map 4.2 km Northeast bearing 33° from San Francisco, San Francisco County, California, United States [?] 9.3 km Southeast bearing 143° from Tiburon, Marin County, California, United States 68.0 km Northwest bearing 320° from San Jose, Santa Clara County, California, United States
Last position:	2026-01-20 18:23:03 UTC (8d 10h48m ago) 2026-01-20 10:23:03 PST local time at San Francisco, United States [?]
Course:	320° – heading 328°
Speed:	17 km/h
Dimensions:	length 32 m width 9 m draught 4.0 m
Last path:	WDA4337>ais via SUNSET
Positions stored:	479233

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.