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 ROYAL_PRINCE - show graphs
Callsign: WCX8037
MMSI number: 366975760
IMO number: 816359
Navigational status: Under way (engine) (0)
Vessel class: (99)
Destination: (ETA ***00 24:60)
Location: 37°48.60' N 122°24.19' W - locator CM87TT14OJ - show map
2.6 miles North bearing 20° from San Francisco, San Francisco County, California, United States [?]
5.3 miles Southeast bearing 146° from Tiburon, Marin County, California, United States
42.8 miles Northwest bearing 320° from San Jose, Santa Clara County, California, United States
Last position: 2025-01-16 22:11:57 EST (3d 7h59m ago)
2025-01-16 19:11:57 PST local time at San Francisco, United States [?]
Course: 302° – heading 511°
Speed: 7 MPH
Dimensions: length 25 m width 9 m draught 0.0 m
Last path: WCX8037>ais via SUNSET
Positions stored: 43971
Stations near current position of ROYAL_PRINCE - show more
callsign distance last heard - EST      callsign distance last heard - EST
FUME BLANC COMMODORE0.3 miles 341°2025-01-01 02:36:11 ENHYDRA0.4 miles 359°2025-01-19 21:34:06
BLACKBIRD0.4 miles 323°2025-01-10 13:25:48 3389210000.5 miles 56°2025-01-09 18:45:22
3669757500.5 miles 295°2025-01-19 20:07:30 3673500500.5 miles 315°2025-01-19 18:57:50
FW15200.7 miles 166°2025-01-20 06:00:45 FIREBOAT 30.7 miles 296°2025-01-17 20:56:29
STAR THROWER0.9 miles 283°2025-01-16 17:57:27 ONE HAMMERSMITH0.9 miles 85°2025-01-18 22:17:37
SOLITARY1.0 miles 317°2025-01-16 10:35:38 OLD BLUE1.1 miles 288°2025-01-08 14:26:07
3677764101.1 miles 126°2025-01-15 19:59:11 3673382901.1 miles 320°2025-01-19 19:27:50
MENDOCINO1.1 miles 20°2025-01-17 22:01:04 FALCON1.2 miles 294°2025-01-20 05:53:53
3677589901.2 miles 126°2025-01-02 10:12:23 6360243301.3 miles 293°2025-01-20 05:52:47
ISLANDER1.4 miles 322°2025-01-14 13:22:42 3683890501.4 miles 322°2024-12-21 13:14:38
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