Callsign:	WDE7721
MMSI number:	367396790
IMO number:	194177
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	SF BAY SHIP ASSIST (ETA ***00 00:00)
Location:	37°48.73' N 122°19.90' W - locator CM87UT04EW - show map 8.4 km Southwest bearing 218° from Berkeley, Alameda County, California, United States [?] 8.7 km Northeast bearing 62° from San Francisco, San Francisco County, California, United States 8.8 km South bearing 200° from Albany, Alameda County, California, United States 65.1 km Northwest bearing 324° from San Jose, Santa Clara County, California, United States
Last position:	2025-11-06 13:19:25 UTC (2d 22h47m ago) 2025-11-06 05:19:25 PST local time at Berkeley, United States [?]
Course:	79° – heading 83°
Speed:	7 km/h
Dimensions:	length 29 m width 10 m draught 4.0 m
Last path:	WDE7721>ais via SUNSET
Positions stored:	62174

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.