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 REX - show graphs
Callsign: SLWF
MMSI number: 265768380
IMO number: 48885
Navigational status: Under way (engine) (0)
Vessel class: (0)
Destination: SL LINJE 89 (ETA Dec24 15:00)
Location: 59°23.92' N 18°21.76' E - locator JO99EJ35MQ - show map
7.0 km Northeast bearing 40° from Kummelnäs, Nacka Kommun, Stockholm, Sweden [?]
8.5 km Northeast bearing 32° from Boo, Nacka Kommun, Stockholm, Sweden
18.4 km Northeast bearing 66° from Stockholm, Stockholms Kommun, Stockholm, Sweden
65.1 km Southeast bearing 141° from Uppsala, Uppsala Kommun, Uppsala, Sweden
Last position: 2026-01-27 16:01:50 UTC (3h27m ago)
2026-01-27 17:01:50 CET local time at Kummelnäs, Sweden [?]
Course: 313.899994° – heading 311°
Speed: 15 km/h
Dimensions: length 27 m width 5 m draught 0.0 m
Last path: SLWF>ais via JohnexTower
Positions stored: 56484
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