Station info - map view · info · telemetry · weather · raw · status · beacons · messages · bulletins · browse · moving · my account
Callsign, ship name or locator: Clear       
It is possible to search using wildcards (*?) after a prefix. Example: OH*
AIS vessel YOHOUMARU - show graphs
Callsign: JD4171
MMSI number: 431009571
Navigational status: Under way (engine) (0)
Vessel class: Tanker (87)
Location: 34°41.26' N 134°23.07' E - locator PM74EQ65DA - show map
7.1 km South bearing 192° from Akō, Hyōgo, Japan [?]
15.0 km Southwest bearing 211° from Aioi-shi, Hyōgo, Japan
73.0 km West bearing 270° from Kōbe-shi, Hyōgo, Japan
102.1 km West bearing 270° from Ōsaka-shi, Ōsaka, Japan
Last position: 2025-01-13 02:02:01 UTC (29d 14h17m ago)
2025-01-13 11:02:01 JST local time at Akō, Japan [?]
Course: 237° – heading 237°
Speed: 21 km/h
Dimensions: length 51 m width 8 m draught 0.0 m
Last path: JD4171>ais via JG3HLX
Positions stored: 9321
About this site
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.
User guide · FAQ · Blog · Discussion group · Linking to aprs.fi · AIS sites · Service status · Database statistics · Advertising on aprs.fi · Technical details · API · Change log · Planned changes · Credits and thanks · Terms Of Service · iPhone/iPad APRS