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 FOUR CAPTAINS - show graphs
Callsign: WDI4637
MMSI number: 367700540
IMO number: 232280
Navigational status: Under way (engine) (0)
Vessel class: Pleasure (37)
Location: 47°32.25' N 122°14.68' W - locator CN87VM09PA - show map
5.8 miles South bearing 188° from Medina, King County, Washington, United States [?]
6.2 miles Southeast bearing 139° from Seattle, King County, Washington, United States
80.8 miles Southeast bearing 140° from Victoria, British Columbia, Canada
Last position: 2025-02-01 19:29:37 EST (55m58s ago)
2025-02-01 16:29:37 PST local time at Medina, United States [?]
Course: 063.2° – heading 511°
Speed: 0 MPH
Dimensions: length 27 m width 4 m draught 0.0 m
Last path: WDI4637>ais via KB7RYY
Positions stored: 6190
Stations near current position of FOUR CAPTAINS - show more
callsign distance last heard - EST      callsign distance last heard - EST
XANADU257.6 yards 161°2025-02-01 18:07:36 DOUBLE PRECISION0.8 miles 28°2025-02-01 20:01:41
WA7YHF B1.2 miles 281°2025-02-01 20:13:41 WA7YHF-B1.2 miles 281°2025-02-01 20:13:51
CAPER1.4 miles 110°2025-02-01 20:22:45 CALYPSO1.4 miles 218°2025-01-25 13:57:06
SEAFARI1.4 miles 215°2025-02-01 20:20:45 W7VXS-31.4 miles 88°2025-02-01 20:21:38
SEAWOLF1.5 miles 144°2025-01-08 11:47:36 AG7NR/M1.6 miles 329°2025-01-26 15:43:29
FW61551.6 miles 70°2025-02-01 20:15:47 KM6SO-101.9 miles 117°2025-02-01 20:24:32
KM6SO-131.9 miles 117°2025-01-17 00:51:55 BILLYWIG2.0 miles 168°2025-02-01 20:24:45
CURVATURE 22.0 miles 330°2025-01-12 18:39:23 PLAN BE2.0 miles 330°2025-01-31 16:27:25
ABSOLUT 22.2 miles 90°2025-02-01 20:23:45 W7MIR-102.2 miles 50°2025-02-01 19:50:39
W7MIR-112.2 miles 50°2025-02-01 19:50:42 W7MIR-132.2 miles 50°2025-02-01 19:50:48
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