Callsign:	WDF5513
MMSI number:	367464090
Navigational status:	Under way (engine) (0)
Vessel class:	Tug (52)
Destination:	ICEOPS
Location:	42°23.39' N 71°03.25' W - locator FN42LJ33LN - show map 3.5 km North bearing 7° from Boston, Suffolk County, Massachusetts, United States [?] 6.3 km North bearing 356° from South Boston, Suffolk County, Massachusetts, United States
Last position:	2026-02-21 16:53:17 UTC (1h20m ago) 2026-02-21 11:53:17 EST local time at Boston, United States [?]
Course:	0° – heading 511°
Speed:	0 km/h
Dimensions:	length 20 m width 6 m draught 2.5 m
Last path:	WDF5513>ais via kx1t
Positions stored:	16844

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.