"clockwise"
 

NFHS rule 6-1-4: "The pitcher may use any windup desired provided:...d. the pitcher does not make more than 1 1/2 clockwise revolutions of the arm in the windmill pitch..." Can somebody please explain this "clockwise" direction?

I always found that funny too. Given that the pitcher is standing up in the middle, clockwise means one thing to F3 and the visitors, and the opposite to F5 and the home team.

What it means is, the arm cannot make more than 1 1/2 revolutions in the direction you and I would normally associate with a pitch (clockwise if you're the first baseman; counter-clockwise if you're the 3rd baseman ... or from the pitchers POV, clockwise if you're right handed and counter if you're left handed.)

clockwise depends on the hemisphere. :D

So, using Figure 24 on Page 48 of the NFHS "2012 and 2013 Softball Umpires Manual" (three-umpire system - B1 behind 1st base, B3 behind 3rd base), it is a legal pitch if I am umpire B1 (clockwise) but I should call an illegal pitch if I'm umpire B3 (counter-clockwise)? Unless I'm in the southern hemisphere? :D

You got it! ;) :D :D