Callsign:	YJWP4
MMSI number:	577593000
IMO number:	924844
Navigational status:	Moored (5)
Vessel class:	Sailing (36)
Destination:	AMSTERDAM
Location:	52°27.78' N 4°39.76' E - locator JO22HL91MD - show map 10.3 km West bearing 276° from Zaanstad, Gemeente Zaanstad, North Holland, Netherlands [?] 11.4 km West bearing 284° from Zaandam, Gemeente Zaanstad, North Holland, Netherlands 18.3 km Northwest bearing 303° from Amsterdam, Gemeente Amsterdam, North Holland, Netherlands 61.4 km North bearing 12° from Rotterdam, Gemeente Rotterdam, South Holland, Netherlands
Last position:	2025-08-19 22:04:47 UTC (11d 14h59m ago) 2025-08-20 00:04:47 CEST local time at Zaanstad, Netherlands [?]
Course:	194° – heading 511°
Speed:	0 km/h
Dimensions:	length 40 m width 6 m draught 3.0 m
Last path:	YJWP4>ais via pa2dx
Positions stored:	1325

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.