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Switch To A Diamond [A2] (Ron Schneider 1973):

From a Wave (or any Line of 4).

Centers Run as Ends do your part Diamond Circulate.

Ends in a Diamond.

Switch To An Hourglass [A2] (Sandy Knowles 1975):

From Parallel Waves (or applicable Parallel Lines).

Centers Run as Ends do your part Hourglass Circulate (Lead Ends 1/2 Circulate as Trailing Ends Veer Inward to end in a Mini-Wave with their opposite).

Ends in an Hourglass.

Switch To A Diamond:     Switch To A Diamond 之前   Centers Run 同时 Ends 'Diamond' Circulate 之后 (完成)

Switch To An Hourglass:     Switch To An Hourglass 之前   Centers Run 同时 Ends 'Hourglass' Circulate 之后 (完成)

• At A2, Switch To A Diamond should only be called from a Wave; and Switch To An Hourglass should only be called from Parallel Waves. At C1 and above, these calls may be called from any legal starting formation.
• On any Switch call, Centers do a Run (flip away from the Center of the formation).
• Switch To A formation:

  Centers Run as Ends do your part of a formation Circulate. Usually ends in the given formation.

• Some glossaries define Switch To A Diamond as Centers Run + New Centers Hinge. We believe it is better to think instead about the Ends doing a Diamond Circulate. This simplifies learning future calls since you can apply the same rule (i.e., a formation Circulate) to three calls (Switch To A Diamond, Switch To An Hourglass, Switch To An Interlocked Diamond). Would you rather memorize three traffic patterns or one rule that you can use for all three calls?

Switch The Wave [A2] (Roger Chapman 1969): From a Wave. Centers Run as Ends Cross Run. Ends in a Two-Faced Line.

Switch To An Interlocked Diamond [C1] (Sandy Knowles 1976): From Parallel Lines|Waves. Centers Run as Ends (do your part) Interlocked Diamond Circulate. Ends in Twin Diamonds.

Switcheroo [C4] (Lee Kopman 1972): From Parallel Waves (or applicable Parallel Lines). Switch To A Diamond; Centers Cast Off 3/4 as Ends Circulate. Parallel Waves end in Parallel Two-Faced Lines.

Cross Roll To A(n) Diamond | Hourglass | Interlocked Diamond [C4]: From Parallel Waves (or applicable Parallel Lines). Centers Cross Run as Ends do your part Diamond | Hourglass | Interlocked Diamond Circulate. A better name for this call might be Cross Switch To A(n) Diamond | Hourglass | Interlocked Diamond.

Cross To A(n) Diamond | Hourglass | Interlocked Diamond [C4]: From Parallel Waves (or applicable Parallel Lines). Centers Crossover Circulate as Ends do your part Diamond | Hourglass | Interlocked Diamond Circulate.

CALLERLAB definition for Switch to a Diamond

CALLERLAB definition for Switch to an Hourglass

Choreography for Switch To A(n) Diamond | Hourglass

Comments? Questions? Suggestions?

A2: