Callsign:	YDDS4
MMSI number:	525114138
Navigational status:	Under way (engine) (0)
Vessel class:	Tanker, carrying hazard/pollutant cat D (84)
Destination:	ID TGU
Location:	1°14.77' N 104°01.30' E - locator OJ21AF29OC - show map 19.7 km East bearing 104° from Singapore, Singapore [?] 29.8 km Southeast bearing 148° from Kampung Pasir Gudang Baru, Johor, Malaysia 38.1 km Southeast bearing 130° from Johor Bahru, Johor, Malaysia
Last position:	2025-11-18 16:51:24 UTC (1d 22h54m ago) 2025-11-19 00:51:24 +08 local time at Singapore, Singapore [?]
Course:	84° – heading 84°
Speed:	24 km/h
Dimensions:	draught 9.6 m
Last path:	YDDS4>ais via 9V1AK
Positions stored:	44

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.