Proper 2-man Technique

[blueump]

Field umpire in the A position when a ball is hit past the second baseman and into right-center field. The outfielder is charging fast.

You know in softball you may either have a normal outfield throw come lobbed to second base, or the fielder may try to cannon a shot to the first baseman for a shot at the force.

What is the proper technique for the field umpire in this situation? Where does he go and set up?