we "train".. tow plane on the horizon.. granted there are hills/mountains
all around so the horizon is a "relative" term...

I've also been on tow on really hazy says when there was no visible horizon.

keep all 3 wheels of the
tow on the same horizontal line.. the tail wheel between the mains.. works
just fine for the Pawnee 235

Yup, reference to the tow plane, that's the ticket. Behind the Birddog,
I like to fly tow so that the horizontal stabilizor lines up where the
gear and wing struts join the fuselage.

Tony V.