In 2002 and 2003 there were several instances of pools being measured and finding they were 1-2 cm short.This caused such wailing and gnashing of teeth that USMS got very careful about pool length.(It also led to new rules on this forum as some people were getting so irate they were no longer civil.)
Swimosauer:
Allan is correct and I have provided a links of stories about this in the past so you can see why we are where we are today.
The Losers - U.S. Masters Swimming Discussion Forums
The Art of Pool Length Measurement - U.S. Masters Swimming Discussion Forums
In 2002 and 2003 there were several instances of pools being measured and finding they were 1-2 cm short.This caused such wailing and gnashing of teeth that USMS got very careful about pool length.(It also led to new rules on this forum as some people were getting so irate they were no longer civil.)
Swimosauer:
Allan is correct and I have provided a links of stories about this in the past so you can see why we are where we are today.
The Losers - U.S. Masters Swimming Discussion Forums
The Art of Pool Length Measurement - U.S. Masters Swimming Discussion Forums