Callsign:	WDF2159
MMSI number:	367425520
IMO number:	550761
Navigational status:	Under way (engine) (0)
Vessel class:	Passenger (60)
Destination:	SF BAY FERRY
Location:	37°46.65' N 122°21.03' W - locator CM87TS76WO - show map 6.1 km East bearing 87° from San Francisco, San Francisco County, California, United States [?] 12.6 km Northeast bearing 51° from Daly City, San Mateo County, California, United States 63.1 km Northwest bearing 321° from San Jose, Santa Clara County, California, United States
Last position:	2025-12-01 21:03:02 UTC (2h22m ago) 2025-12-01 13:03:02 PST local time at San Francisco, United States [?]
Course:	114.400002° – heading 511°
Speed:	48 km/h
Dimensions:	length 35 m width 8 m draught 0.0 m
Last path:	WDF2159>ais via AA6CE
Positions stored:	34300

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.