Locating a plane that isn't on the map using latitude + longitude.
Open maps.google.com
In the search bar paste the latitude + longitude from ADSB. (Delete the words but keep the degrees). Like so:
46.01642° 26.36403°
Comma separator works but is optional
Negative longitude is parsed correctly as west longitude. If your lat/long includes E or W Google maps can parse that as well.
Google maps can parse latitude and longitude in various formats including degrees/minutes/seconds, decimal degrees, etc.
Hit enter and locate your aircraft.