From memory its to stop a jib attachment point moving about, especially if you are using a jib boom a la Malcolm and Big Issue
[quote by=John_Murrell link=Blah.cgi?b=Cool1,m=1183820755,s=1 date=1183844518]From memory its to stop a jib attachment point moving about, especially if you are using a jib boom a la Malcolm and Big Issue[/quote]
Ah I see ... to stop this ...
(http://www.national12.org/pictures/boat_45.jpg)
Not quite, it stops you doing a full modelyacht style jib with the tack in front of the pivot and self tensioning the leech. The one in the pic is legal but just requires a bit more string...
Mike C on David W's computer