that has been borrowed from monohull sailing, mostly larger boats where there is alot of messing with spin poles and gear.

It is a good idea, as you say in large fleets. It is also a nice safety feature to keep boats from bearing away into any boats coming in on Kamikaze port.



It has also been added to the US sailing Multihull course card with the designation as "course #" followed by an O



I think that you can get your fill of reaching in distance racing