Callsign:	WDJ4040
MMSI number:	367122610
IMO number:	951487
Navigational status:	Undefined/default (15)
Vessel class:	Tug (52)
Destination:	CHANNAHON
Location:	41°45.09' N 87°51.37' W - locator EN61BS70GI - show map 1.2 km North bearing 16° from Willow Springs, Cook County, Illinois, United States [?] 1.7 km Northwest bearing 297° from Justice, Cook County, Illinois, United States 20.3 km Southwest bearing 237° from Chicago, Cook County, Illinois, United States 38.5 km East bearing 91° from Aurora, Kane County, Illinois, United States
Last position:	2025-08-29 03:18:55 UTC (2d 1h20m ago) 2025-08-28 22:18:55 CDT local time at Willow Springs, United States [?]
Course:	225° – heading 226°
Speed:	11 km/h
Dimensions:	length 16 m width 6 m draught 2.0 m
Last path:	WDJ4040>ais via Snhnry
Positions stored:	10894

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.