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 W9GRG-9 - show graphs
Comment: Monitoring 146.520
Location: 32°26.01' N 110°45.06' W - locator DM42OK94VA - show map
17.8 km Southeast bearing 117° from Catalina, Pima County, Arizona, United States [?]
20.8 km East bearing 77° from Oro Valley, Pima County, Arizona, United States
28.7 km Northeast bearing 35° from Tucson, Pima County, Arizona, United States
148.5 km Southeast bearing 137° from Mesa, Maricopa County, Arizona, United States
Last position: 2025-08-30 20:02:06 UTC (1d 22h17m ago)
2025-08-30 13:02:06 MST local time at Catalina, United States [?]
Altitude: 2407 m
Course: 204°
Speed: 0 km/h
Last path: W9GRG-9>APAT81-1 via HELIO*,WIDE2-2,qAR,W7BAN (good)
Positions stored: 326
Other SSIDs: W9GRG-I
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