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*
Web station W4AI-4 - show graphs
Comment: aprs.fi for iOS
Location: 44°02.75' N 69°30.50' W - locator FN54FB81XA - show map
1.7 km Northeast bearing 30° from Damariscotta, Lincoln County, Maine, United States [?]
4.2 km Southwest bearing 206° from Nobleboro, Lincoln County, Maine, United States
56.7 km East bearing 96° from Lewiston, Androscoggin County, Maine, United States
73.5 km Northeast bearing 54° from Portland, Cumberland County, Maine, United States
Last position: 2025-07-25 15:22:46 UTC (2d 3h19m ago)
2025-07-25 11:22:46 EDT local time at Damariscotta, United States [?]
Altitude: 16 m
Course: 38°
Speed: 8 km/h
Last path: W4AI-4>aprs.fi via aprsfi-iOS
Positions stored: 30557
Other SSIDs: W4AI W4AI-D W4AI-B W4AI-9 W4AI-7 W4AI-10
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