We don't need to know
about Ground Effect on a Sailboat. A sailor isn't really concerned with
Downdraft or Updraft. We don't have Flaps or Props or Jets.

whatever are you babbling about? *that* is the reason you think air movement
reacts differently to a verticle surface than it does to a horizontal surface??
geesh, old man, air flow doesn't know or care.

old man continues with more tripe thusly:

A Sailor has Halyards, Outhauls, Sheets, Sheeting Angles, Cunninghams,
Vangs, Back stay adjustments, Forestay tension, Barbar hauls.