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*
APRS station KY1U-9 - show graphs
Mic-E message: Off duty
Location: 42°24.89' N 71°09.23' W - locator FN42KJ19MN - show map
5.4 km Northwest bearing 304° from Somerville, Middlesex County, Massachusetts, United States [?]
5.9 km Northwest bearing 318° from Cambridge, Middlesex County, Massachusetts, United States
9.9 km Northwest bearing 309° from Boston, Suffolk County, Massachusetts, United States
12.5 km Northwest bearing 317° from South Boston, Suffolk County, Massachusetts, United States
Last position: 2026-02-03 12:47:46 UTC (4d 22h28m ago)
2026-02-03 07:47:46 EST local time at Somerville, United States [?]
Altitude: 7 m
Course: 39°
Speed: 11 km/h
Device: Kenwood: TM-D710 (rig)
Last path: KY1U-9>TRRT8Y via WIDE1-1,qAR,W1XM (good)
Positions stored: 3793
Other SSIDs: KY1U-12 KY1U KY1U-5
Stations which heard KY1U-9 directly on radio –
callsign pkts first heard - UTC last heard longest (tx => rx) longest at - UTC

Only position packets which were originated by the station are shown here. The range statistics show some extra long hops, because some digipeaters do not correctly add themselves to the digipeater path. Please check the raw packets.
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