On Tuesday, February 5, 2019 at 10:34:14 AM UTC-5, wrote:
I remember a fatal midair over Bridgeport, Ca. When we had 1/4 mile radius! Both pilots were looking at the photo target when hitee slid directly under the hitter, who made a hard left turn to get his photo of the turnpoint.. His left wing tip hit the cockpit of the other glider, which spiraled in. Hitter was able to land OK. Won’t the new rule require “eyes in cockpit”, as we watch the DME count down to .5?
I also like to use the1 mile radius to “adjust” my time on the final TP. You can burn 4 productive minutes by going a mile beyond the TP, then reverse and head for the barn. Is there a good reason to change the radius? Scoring programs will need to be changed, also!
JJ

The reason is to more closely align with IGC rules without going to metric.
"Good" reason depends on individual point of view.
UH