From a Completed Double Pass Thru.

Tandem Partner Trade; Extend n times.

这是下列各图的起始队形:           Track 0 之后   Track 1 之后   Track 2 之后   Track 3 之后   Track 4 之后

注意:

• Track n can only be done from a Completed Double Pass Thru. It is inappropriate to call Track n from formations such as Parallel Waves or Mini-Wave Columns.
• Note: Track is used as a Tagging call.

Track 2 [Plus] (Dick Bayer 1976): From completed Double Pass Thru. Tandem Partner Trade; Extend twice. Ends in Parallel R-H Waves.