From a Generalized Tidal Line.
Center pairs of dancers (3 pairs from an 8-dancer Tidal Line, 
  2 pairs from a 6-dancer Tidal Line) 
  Grand (Working As Centers) 
  Cross Run (like a Grand Slip-Slide); new Center pairs of dancers Trade (Grand Slip).
Ends in a Tidal Line.  
  This is a 2-part call.
Cheat (from a Line of 8): Triple Trade and Spread; Triple Trade.
Grand Swing & Mix [C3A]:
 From Facing Lines or a Tidal Wave:  
  Arm Turn 1/2 (Swing); Grand Mix.  
  This is a 3-part call.
Grand 1/4 (or 3/4) Mix [C3A]:
 From R-H Columns (or other applicable formations).
Those who can Right Arm Turn 1/4 (or 3/4); all Grand Mix.  
This is a 3-part call.