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Dan Fahey · 10-30-2020, 02:21 PM

Define a Mineshaft Day?
Guessing well below Zero DA

This is the ISA Definition of DA at Sea Level
International Standard Atmosphere(ISA)

Sea level (0 ft. (0km)) altitude,
Temperature 59 degrees F (+15c)
Barometer of 29.92 inHg).

My thinking is set a rule.
Such as running 1.20 under at Zero DA or Higher be subject to the rules.

Be interesting seeing National Record post with DA, track and day.

We have the technology to do this.
Should help keep the definition and ruling consistent.

10-30-2020, 02:21 PM	#11
Dan Fahey VIP Member Join Date: Oct 2008 Posts: 2,128 Likes: 1,084 Liked 184 Times in 113 Posts	Re: What Stock rules would you change? Define a Mineshaft Day? Guessing well below Zero DA This is the ISA Definition of DA at Sea Level International Standard Atmosphere(ISA) Sea level (0 ft. (0km)) altitude, Temperature 59 degrees F (+15c) Barometer of 29.92 inHg). My thinking is set a rule. Such as running 1.20 under at Zero DA or Higher be subject to the rules. Be interesting seeing National Record post with DA, track and day. We have the technology to do this. Should help keep the definition and ruling consistent.