so ive been messing with APRS for a few weeks now and i finally got my TM-D710G beaconing but the position it shows on aprs.fi is like 3 miles from where i actually am. the radio has a GPS built in and it says it has a lock, showing like 8 satellites, so im not sure whats going on. i set the beacon rate to 1 minute just to test things out and i can see my callsign popping up on the map but consistently in the wrong spot.

i checked the lat/lon in the radio settings and they look right to me but maybe im reading them wrong? also not sure if it matters but im going through a local digi that i can see is hitting the WIDE1-1 path. wondering if maybe the radio is somehow using the manually entered coordinates instead of the GPS feed? i havent touched the manual position settings in a while so i dont know if that would even be a thing. anyone run into this?

yeah that's almost certainly the manual position override. on the D710 there's a setting buried in the APRS menu where you can toggle between GPS and manual position input, and if it got switched to manual at some point it'll just keep transmitting whatever coordinates you typed in originally. go into the APRS setup and look for something like position input method or GPS vs manual — it's not super obvious where it sits in the menu. once you flip it back to GPS it should start pulling the actual position from the receiver. happens more than you'd think, especially if someone was demoing the radio indoors and keyed in a position manually.

also worth double checking which datum the GPS is outputting vs what aprs.fi expects. pretty sure aprs.fi uses WGS84 and most modern GPS receivers default to that anyway but ive seen some older setups cause a small offset if theres a datum mismatch. probably not your issue since youre using the built in GPS on the 710 but just something to rule out if fixing the manual/GPS toggle doesnt solve it. 3 miles off does sound more like the manual position thing tbh.