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 Z FOUR - show graphs
Map loading...
Callsign: WDE7715
MMSI number: 367396710
IMO number: 194165
Navigational status: Under way (engine) (0)
Vessel class: Tug (52)
Destination: ALAMEDA4 (ETA Sep14 18:00)
Location: 37°48.11' N 122°22.21' W - locator CM87TT52NK - show map - static map
3.3 miles Northeast bearing 55° from San Francisco, San Francisco County, California, United States [?]
6.8 miles Southeast bearing 136° from Tiburon, Marin County, California, United States
41.2 miles Northwest bearing 321° from San Jose, Santa Clara County, California, United States
Last position: 2020-01-23 21:14:16 EST (1d 15h4m ago)
2020-01-23 18:14:16 PST local time at San Francisco, United States [?]
Course: 091.3° – heading 86°
Speed: 12 MPH
Dimensions: length 29 m width 10 m draught 4.0 m
Last path: WDE7715>ais via N8QH
Positions stored: 30901
Stations near current position of Z FOUR - show more
callsign distance last heard - EST      callsign distance last heard - EST
SOUND RELIANCE0.3 miles 301°2020-01-24 15:28:48 GERNER MAERSK0.3 miles 99°2020-01-16 20:31:15
SUNSHINE DAYDREAM0.4 miles 107°2020-01-04 19:05:55 OSTINATO0.5 miles 334°2019-12-31 11:49:51
TUFTY0.5 miles 147°2019-12-26 15:12:41 CG ASPEN0.7 miles 47°2020-01-21 10:09:34
JEANETTE C0.7 miles 172°2020-01-08 15:39:11 SONRISA0.7 miles 63°2020-01-20 21:00:50
KATAMY0.7 miles 240°2020-01-01 17:10:37 ENTERPRISE 0.7 miles 225°2020-01-19 20:38:35
3381068890.7 miles 323°2019-12-29 16:05:55 INTINTOLI0.8 miles 292°2020-01-24 23:21:36
HYDRUS0.8 miles 267°2020-01-24 15:10:46 RICH PADDEN0.8 miles 332°2020-01-23 08:35:01
SAN FRANCISCO0.8 miles 278°2020-01-24 21:33:25 VELA0.9 miles 282°2020-01-22 21:05:55
SAN FRANCISCO BELLE0.9 miles 279°2020-01-01 03:20:53 SEAWAYS RUBYMAR0.9 miles 157°2020-01-24 01:58:33
TAMALPAIS1.0 miles 262°2020-01-01 02:52:52 DIAMOND SEAS1.0 miles 226°2020-01-01 20:59:37
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