Callsign:	JD4939
MMSI number:	431017504
IMO number:	918353
Navigational status:	Under way (engine) (0)
Vessel class:	Tanker (80)
Destination:	>JP MIZ KAMASIMA E (ETA Aug07 22:30)
Location:	34°24.84' N 134°12.83' E - locator PM74CJ59PI - show map 8.2 km South bearing 160° from Tonoshō, Kagawa, Japan [?] 10.7 km North bearing 20° from Shido, Kagawa, Japan 93.9 km West bearing 251° from Kōbe-shi, Hyōgo, Japan 116.3 km West bearing 261° from Sakai, Ōsaka, Japan
Last position:	2025-08-07 12:06:47 UTC (5d 23h55m ago) 2025-08-07 21:06:47 JST local time at Tonoshō, Japan [?]
Course:	290° – heading 291°
Speed:	23 km/h
Dimensions:	length 68 m width 12 m draught 5.0 m
Last path:	JD4939>ais via JG3HLX
Positions stored:	28473

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.