Callsign:	JD4139
MMSI number:	431008976
IMO number:	810006
Navigational status:	Under way (engine) (0)
Vessel class:	Tanker (80)
Destination:	>JP NGO OFF (ETA Aug19 02:30)
Location:	37°42.99' N 138°01.90' E - locator PM97AR31TW - show map 53.9 km Southwest bearing 221° from Ryōtsu, Niigata, Japan [?] 60.0 km Northwest bearing 311° from Kashiwazaki, Niigata, Japan 89.5 km West bearing 257° from Niigata-shi, Niigata, Japan 119.1 km North bearing 354° from Nagano-shi, Nagano, Japan
Last position:	2025-11-22 02:56:12 UTC (1d 11h14m ago) 2025-11-22 11:56:12 JST local time at Ryōtsu, Japan [?]
Course:	254° – heading 255°
Speed:	21 km/h
Dimensions:	length 69 m width 11 m draught 5.1 m
Last path:	JD4139>ais via JH0WSL
Positions stored:	14175

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.