How does Winscore calculate finish altitude?

On Jul 28, 6:44 am, wrote:
A question: How does Winscore calculate finish altitude on a cylinder
finish?

Winscore calculates altitudes and finish heights according to SSA
Contest rules 6.7.4.3 and 11.2.1.5.1.
....
Guy Byars
Author of Winscore

Winscore calculates altitudes and finish heights according to SSA
Contest rules 6.7.4.3 and 11.2.1.5.1.
...
Guy Byars
Author of Winscore

What does winscore do about

6.7.4 Altitude recording
6.7.4.1 A Flight Recorder may record altitude derived
from a calculated position. The estimated altitude inaccuracy shall be
applied in a way unfavorable to the pilot (if the flight log does not
include a reliable estimate of this inaccuracy, a value of 75 feet
shall be used).
6.7.4.2 A Flight Recorder may record a calibratable
pressure altitude. If such a device is used in circumstances where
altitude is needed, the altitude inaccuracy determined from the best
available calibration data shall be applied in a way unfavorable to
the pilot.
6.7.4.3 If a Flight Recorder records both calculated
and pressure altitude, pressure altitude will be the primary data
source and calculated altitude will be the backup data source for
flight evaluation.

I've never really understood these rules. Does winscore subtract 75
feet from GPS altitude in deciding if you get a penalty (or add it for
start gates and 17500?) I've never submitted calibration data at a
contest, does 6.7.4.2. apply anywhere?

John Cochrane