Can someone please explain this?

[chucklestheclown]

Originally Posted by blackthroatedwind

Try putting that poster on ignore.

The concept is really very simple. The speed of the track can change during the day....just as it changes from day to day. There are obvious reasons for this.....rain during the day is the most blatant. A significant change in wind conditions is another. Also, perhaps a track is watered excessively and/or raked differently at some point in the middle of the card. This, too, could change the speed of the course.

In other words...it is a fancy term for what you already know...ignore people that use the term and you will be better off.