Callsign:	SLWF
MMSI number:	265768380
IMO number:	48885
Navigational status:	Under way (engine) (0)
Vessel class:	(0)
Destination:	SL LINJE 89
Location:	59°45.47' N 18°42.91' E - locator JO99IS51TU - show map 574.6 m East bearing 92° from Norrtälje, Norrtälje Kommun, Stockholm, Sweden [?] 16.0 km West bearing 273° from Björkö, Norrtälje Kommun, Stockholm, Sweden 59.8 km Northeast bearing 38° from Stockholm, Stockholms Kommun, Stockholm, Sweden 60.8 km East bearing 100° from Uppsala, Uppsala Kommun, Uppsala, Sweden
Last position:	2025-07-26 03:26:00 UTC (1d 9h4m ago) 2025-07-26 05:26:00 CEST local time at Norrtälje, Sweden [?]
Course:	360° – heading 281°
Speed:	0 km/h
Dimensions:	length 27 m width 5 m draught 2.6 m
Last path:	SLWF>ais via hankoais
Positions stored:	52661

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.