Callsign:	WDI7931
MMSI number:	367733650
Navigational status:	Under way (engine) (0)
Vessel class:	SAR (51)
Destination:	A
Location:	37°46.82' N 122°22.91' W - locator CM87TS47EG - show map 3.4 km East bearing 80° from San Francisco, San Francisco County, California, United States [?] 10.1 km West bearing 255° from Oakland, Alameda County, California, United States 65.1 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2026-01-28 23:04:12 UTC (27d 12h19m ago) 2026-01-28 15:04:12 PST local time at San Francisco, United States [?]
Course:	2° – heading 354°
Speed:	17 km/h
Dimensions:	draught 3.0 m
Last path:	WDI7931>ais via AA6CE
Positions stored:	76676

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.