I always considered large coils to be incapable of separating the closely spaced targets. Such coil must respond to several targets at once, mustn’t it? I checked this with a 15-inch coil… Watch the video.
The fact itself surprised me: how the 15-inch is capable of separating these targets so accurately. Now I can understand those hunters who use exclusively large coils (as universal ones, for everyday use).
In my test: the Garrett AT PRO metal detector (PRO mode) and MarsMD Goliath coil (15 inches, DD).