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 W3KRZ-4 - show graphs
Location: 38°56.94' N 76°29.47' W - locator FM18SW17BS - show map
3.3 km South bearing 178° from Annapolis, Anne Arundel County, Maryland, United States [?]
4.1 km South bearing 184° from Naval Academy, Anne Arundel County, Maryland, United States
39.3 km South bearing 165° from Baltimore, City of Baltimore, Maryland, United States
159.4 km Southwest bearing 226° from Philadelphia, Philadelphia County, Pennsylvania, United States
Last position: 2025-02-28 21:50:07 UTC (5d 1h55m ago)
2025-02-28 16:50:07 EST local time at Annapolis, United States [?]
Course:
Speed: 9 km/h
Last path: W3KRZ-4>APN000 via TCPIP*,qAC,T2CAEAST
Positions stored: 2565
Other SSIDs: W3KRZ-10 W3KRZ-7 W3KRZ-7 W3KRZ W3KRZ-10 W3KRZ W3KRZ-3 W3KRZ-2
Last heard a station directly: 2025-02-28 23:39:09 UTC (5d 6m ago)
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