From a Generalized Tidal Line.
Outside 4 Cast Off 3/4 and 
  Cross Concentric 
  Vertical 1/2 Tag 
  (if Ocean) or Cross Concentric Vertical Left 1/2 Tag 
  (if Sea) as the others Hinge, 
  Partner Tag, 
  Press Ahead, 
  and individually turn 1/4 toward the given direction or do the anything call.
Usually ends in Parallel Lines.
Notes:
- 
If the caller wishes the new Outsides to do the anything call working 
    Concentric, 
    the caller should so indicate (e.g., from a Tidal Wave: Divide The Ocean Concentric 
    Shakedown).
 - 
There is no default direction or anything call.  If the
    caller omits the direction | anything,
    then the original Centers Hinge; Partner Tag and Press Ahead.
 
Single Divide The Ocean | Sea direction | anything [C4]:
 From a Generalized Line.  
  Ends 3/4 Out (Single Cast Off 3/4), Step Ahead and Touch (if Ocean) or Left Touch (if
  Sea) as Centers Hinge, Partner Tag, Press Ahead and individually turn
  1/4 toward the given direction or do the anything call.
  Usually ends in a Line.
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 Single Divide The Ocean Right:    |