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 UNITY LIGHT - show graphs
Callsign: C6FM4
MMSI number: 311001145
IMO number: 9832444
Navigational status: Under way (engine) (0)
Vessel class: Cargo (79)
Destination: BUNBURY
Location: 37°59.70' N 122°25.13' W - locator CM87SX98RT - show map
3.7 miles Northwest bearing 312° from North Richmond, Contra Costa County, California, United States [?]
5.6 miles Northwest bearing 317° from Richmond, Contra Costa County, California, United States
15.2 miles North bearing 0° from San Francisco, San Francisco County, California, United States
53.6 miles Northwest bearing 328° from San Jose, Santa Clara County, California, United States
Last position: 2025-01-31 15:01:34 EST (12h51m ago)
2025-01-31 12:01:34 PST local time at North Richmond, United States [?]
Course: 30.299999237061° – heading 31°
Speed: 16 MPH
Dimensions: length 180 m width 30 m draught 6.3 m
Last path: C6FM4>ais via SUNSET
Positions stored: 814
Stations near current position of UNITY LIGHT - show more
callsign distance last heard - EST      callsign distance last heard - EST
OCEAN RELIANCE522.4 yards 38°2025-01-29 16:14:47 FISHING CREEK0.9 miles 207°2025-01-27 04:06:43
Vts. PT. SAN PABLO2.3 miles 186°2025-01-31 13:49:40 JAMAICA BAY3.2 miles 195°2025-01-23 07:55:44
SOLANA3.7 miles 190°2025-02-01 00:08:16 3673030004.4 miles 185°2025-01-04 22:32:43
FW15894.7 miles 106°2025-02-01 03:48:23 BETTY L4.8 miles 184°2025-01-28 14:31:47
3681712704.8 miles 176°2025-02-01 02:27:08 3673732804.8 miles 183°2025-01-09 07:11:51
LEMAN4.9 miles 176°2025-01-30 18:26:22 DELTA CATHRYN5.1 miles 183°2025-01-25 22:23:06
TEXAS VOYAGER5.1 miles 175°2025-01-30 16:26:29 MARE ISLAND5.4 miles 183°2025-01-31 23:26:35
VELA5.4 miles 183°2025-01-31 23:03:14 MARIN5.4 miles 209°2025-01-31 21:37:28
SAN FRANCISCO5.4 miles 212°2025-01-31 23:24:39 SUN DRAGON5.4 miles 182°2025-01-25 19:23:15
KM6IC5.7 miles 29°2025-01-10 22:05:24 SEAWAYS MOMENT5.7 miles 196°2025-01-29 01:49:34
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