Callsign:	JD4539
MMSI number:	431012999
IMO number:	858307
Navigational status:	Under way (engine) (0)
Vessel class:	Tanker (80)
Destination:	>JP NAO
Location:	37°13.43' N 138°15.04' E - locator PM97DF03BR - show map 8.5 km North bearing 8° from Jōetsu, Niigata, Japan [?] 23.0 km North bearing 0° from Arai, Niigata, Japan 63.9 km North bearing 6° from Nagano-shi, Nagano, Japan 101.6 km Southwest bearing 222° from Niigata-shi, Niigata, Japan
Last position:	2025-07-24 09:46:59 UTC (9h1m ago) 2025-07-24 18:46:59 JST local time at Jōetsu, Japan [?]
Course:	209.300003° – heading 200°
Speed:	11 km/h
Dimensions:	length 65 m width 10 m draught 4.5 m
Last path:	JD4539>ais via JH0WSL
Positions stored:	39560

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.