Callsign:	PG4157
MMSI number:	244660230
IMO number:	805453
Navigational status:	At anchor (1)
Vessel class:	Dredging/underwater operations (33)
Destination:	WERKENDAM (ETA Dec19 23:02)
Location:	51°54.13' N 4°16.87' E - locator JO21DV36RM - show map 4.3 km West bearing 255° from Vlaardingen, Gemeente Vlaardingen, South Holland, Netherlands [?] 7.6 km West bearing 256° from Schiedam, Gemeente Schiedam, South Holland, Netherlands 66.9 km Southwest bearing 219° from Amsterdam, Gemeente Amsterdam, North Holland, Netherlands 117.0 km North bearing 358° from Brussels, (Bruxelles-Capitale), Brussels Capital Region, Belgium
Last position:	2025-09-04 13:20:42 UTC (10d 3h6m ago) 2025-09-04 15:20:42 CEST local time at Vlaardingen, Netherlands [?]
Course:	360° – heading 511°
Speed:	0 km/h
Dimensions:	length 76 m width 10 m draught 2.0 m
Last path:	PG4157>ais via S.I.T.T.
Positions stored:	33676

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.