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 CHALLENGER4 - show graphs
Callsign: 235010000
MMSI number: 235010000
IMO number: 117985
Navigational status: Under way (engine) (0)
Vessel class: Sailing (36)
Location: 50°46.47' N 1°05.58' W - locator IO90KS85UV - show map
3.4 km Southeast bearing 132° from Gosport, Hampshire, England, United Kingdom [?]
8.2 km East bearing 112° from Lee-on-the-Solent, Hampshire, England, United Kingdom
105.8 km Southwest bearing 220° from London, Greater London, England, United Kingdom
107.7 km Southwest bearing 221° from City of London, Greater London, England, United Kingdom
Last position: 2025-03-01 17:02:06 UTC (4d 15h49m ago)
2025-03-01 17:02:06 GMT local time at Gosport, United Kingdom [?]
Course: 334° – heading 329°
Speed: 13 km/h
Dimensions: length 22 m width 5 m draught 0.0 m
Last path: 235010000>ais via G7RUH
Positions stored: 22983
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