Callsign:	JD4539
MMSI number:	431012999
IMO number:	858307
Navigational status:	Under way (engine) (0)
Vessel class:	Tanker (80)
Destination:	>JP KSM OFF (ETA Oct16 15:00)
Location:	37°12.28' N 138°15.49' E - locator PM97DE09XD - show map 6.6 km North bearing 17° from Jōetsu, Niigata, Japan [?] 20.9 km North bearing 2° from Arai, Niigata, Japan 61.9 km North bearing 6° from Nagano-shi, Nagano, Japan 102.7 km Southwest bearing 221° from Niigata-shi, Niigata, Japan
Last position:	2025-11-01 11:48:26 UTC (16h44m ago) 2025-11-01 20:48:26 JST local time at Jōetsu, Japan [?]
Course:	216° – heading 212°
Speed:	16 km/h
Dimensions:	length 65 m width 10 m draught 4.5 m
Last path:	JD4539>ais via JH0WSL
Positions stored:	41775

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.