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 ALK - show graphs
Callsign: PA3931
MMSI number: 244730196
IMO number: 183984
Navigational status: Under way (engine) (0)
Vessel class: Cargo (79)
Destination: (ETA Dec08 18:39)
Location: 51°54.43' N 4°24.91' E - locator JO21EV97TR - show map
2.9 miles West bearing 249° from Rotterdam, Gemeente Rotterdam, South Holland, Netherlands [?]
6.5 miles West bearing 264° from Capelle-West, Gemeente Capelle aan den IJssel, South Holland, Netherlands
38.0 miles Southwest bearing 212° from Amsterdam, Gemeente Amsterdam, North Holland, Netherlands
73.0 miles North bearing 2° from Brussels, (Bruxelles-Capitale), Brussels Capital Region, Belgium
Last position: 2025-01-07 08:41:10 EST (31d 15h27m ago)
2025-01-07 14:41:10 CET local time at Rotterdam, Netherlands [?]
Course: 325° – heading 511°
Speed: 0 MPH
Dimensions: length 20 m width 10 m draught 2.2 m
Last path: PA3931>ais via S.I.T.T.
Positions stored: 13021
Stations near current position of ALK - show more
callsign distance last heard - EST      callsign distance last heard - EST
CATHARINA 100.9 miles 190°2025-01-21 01:38:47 SVEN D1.2 miles 216°2025-02-02 15:16:00
SEAWAY ALFA LIFT1.4 miles 149°2025-02-03 01:41:45 SEATRADE GREEN1.5 miles 268°2025-01-23 02:46:03
SEAWAY VENTUS1.6 miles 272°2025-02-07 01:43:50 MPI ADVENTURE1.9 miles 254°2025-02-01 00:14:15
SEAWAYS WARWICK2.4 miles 236°2025-02-06 03:41:48 BRITISH ENGINEER2.4 miles 255°2025-02-05 22:01:17
HERANGER2.4 miles 256°2025-02-07 14:59:10 LISCA NERA M2.4 miles 256°2025-02-07 16:04:12
CONTSHIPS BOREALIS2.6 miles 257°2025-02-07 13:02:55 MSTX 153.2 miles 87°2025-01-18 13:10:08
PD9MS-63.3 miles 68°2025-01-21 03:33:59 PD0JOY3.3 miles 266°2025-02-07 20:36:26
PD0JOY-93.4 miles 267°2025-02-08 00:07:08 ELANDRA SWIFT3.7 miles 256°2025-02-06 16:32:50
ARABELLA3.8 miles 258°2025-02-07 21:08:23 ERNE3.9 miles 256°2025-01-29 05:47:50
ROLLDOCK STAR3.9 miles 256°2025-01-31 04:22:45 PA4COR-93.9 miles 143°2025-01-20 11:14:39
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