Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
AIS vessel SARAH REED - show graphs
Callsign: WDH9748
MMSI number: 367003250
IMO number: 108
Navigational status: Under way (engine) (0)
Vessel class: Towing (31)
Destination: US^0ZJ8>0SRU
Location: 37°47.13' N 122°22.80' W - locator CM87TS48JM - show map
3.7 km East bearing 71° from San Francisco, San Francisco County, California, United States [?]
11.4 km Northeast bearing 39° from Daly City, San Mateo County, California, United States
65.4 km Northwest bearing 319° from San Jose, Santa Clara County, California, United States
Last position: 2025-12-07 14:23:09 UTC (12h24m ago)
2025-12-07 06:23:09 PST local time at San Francisco, United States [?]
Course: 350° – heading 348°
Speed: 13 km/h
Dimensions: length 19 m width 8 m draught 3.1 m
Last path: WDH9748>ais via AA6CE
Positions stored: 35589
About this site
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.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS