Past performances are written largely from the charts generated from every horse race run in the U.S. and Canada. Just how are they written? What does it sound like when a chart caller chronicles a race? How has the process advanced over the years? How are differences of opinion about track conditions resolved?

Steve Peery and Rowan Ward of Equibase are the guests who answer those questions on this week's Ron Flatter Racing Pod. They take us through the steps they take in every race to determine where horses are at each call. They also describe how video has enhanced the accuracy of charts and talk about the deadlines they face in generating the information twice every hour on race days.

They also discuss the debates over the track conditions last month on Preakness day and the first time the term wet-fast was used for the Kentucky Derby.

The Ron Flatter Racing Pod via Horse Racing Nation is available via free subscription from Apple, Firefox, iHeart and Spotify as well as HorseRacingNation.com.