According to the rules you can have a 'Clear window up to 36" long by 12" wide'
New sails don't have windows.
Rule book can be found here
http://www.sprint15.com/rules/class_rules.php
These are good rules. We should work hard to maintain these rules.Bob Carter wrote:The golden rules which we have followed when passing all those changes in rule 10 at our AGMs are:
1) they must be inexpensive
2) they must be easily retrofitted to old boats, so the old boats do not become obsolete.
3) they must not make a significant change to boat speed and represent an unfair advantage.
It is only by following these rules that we have maintained fair one design class racing yet allowed minor variations which make the boat nicer to sail.