The message
from DSK contains these words:

BTW if you want to place a limit on your challenge of winds 10 knots,
you might also be aware that other specialized craft have a right to
name their favorite conditions too. Try racing against a Thistle in
winds of less than 3 knots.

Possibly then it is not the wisest decision (made many years ago) to
have only Thistle (and no other boats) as the Primary Yardstick in the
American Portsmouth Yardstick Scheme. This can give skewing problems
because of the biassed characteristics of its performance.

RYA Portsmouth Yardstick Scheme (on which Dixie was based in 1961) uses
several Primary Yardstick classes so making it more a level "playing
field" in comparing classes' performances.

These include single-handed and two handed, una rigged, two sail and
three sail (with conventional and asymetric spis), modern and older
designs.

Stuart
Chairman: RYA Portsmouth Yardstick Advisory Group