[target] Moved to the CH2 hole. Why use "CH2" and "C12" to name holes?

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User name Rondon

Log entry time 21:26:07 on April17,2012

Entry number 375964

keyword=[target] Moved to the CH2 hole. Why use "CH2" and "C12" to name holes?

Moved to CH2 hole.

The use of CH2 and C12 to refer to holes in the ladder is a source of confusion to non-target workers. The "C12" hole is suppossed to be just a 10 mm (.397") diameter hole, and the CH2 is an 8 mm (.312") dia. one. Are there actual disk targets in the holes?