Callsign:	WDJ4040
MMSI number:	367122610
IMO number:	53777
Navigational status:	Undefined/default (15)
Vessel class:	Tug (52)
Destination:	CHANNAHON (ETA ***00 00:00)
Location:	41°40.99' N 87°59.30' W - locator EN61AQ13JW - show map 1.5 km Northeast bearing 46° from Lemont, Cook County, Illinois, United States [?] 7.7 km South bearing 189° from Darien, DuPage County, Illinois, United States 28.8 km East bearing 107° from Aurora, Kane County, Illinois, United States 33.6 km Southwest bearing 237° from Chicago, Cook County, Illinois, United States
Last position:	2025-03-14 01:33:09 UTC (11m5s ago) 2025-03-13 20:33:09 CDT local time at Lemont, United States [?]
Course:	360.0° – heading 336°
Speed:	2 km/h
Dimensions:	length 16 m width 6 m draught 2.0 m
Last path:	WDJ4040>ais via WD9EPF
Positions stored:	6918

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.