Callsign:	WDI7931
MMSI number:	367733650
Navigational status:	Under way (engine) (0)
Vessel class:	SAR (51)
Destination:	A
Location:	37°47.42' N 122°23.26' W - locator CM87TS39LQ - show map 3.3 km Northeast bearing 59° from San Francisco, San Francisco County, California, United States [?] 11.4 km Northeast bearing 35° from Daly City, San Mateo County, California, United States 66.3 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position:	2025-11-16 19:23:24 UTC (15d 3h56m ago) 2025-11-16 11:23:24 PST local time at San Francisco, United States [?]
Course:	166° – heading 248°
Speed:	0 km/h
Dimensions:	draught 3.0 m
Last path:	WDI7931>ais via AA6CE
Positions stored:	76580

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.