Plate down = bow down. Plate up = bow up.
Like everyone else the reading on the gauge can get confusing. Mine reads 0% = needle all the way to the left = plate all the way up. 100% = needle all the way to the right = plate all the way down.
Thanks for all the help in getting my wave dialed in just right! By taking all the advice from you guys my wave is killer!! We filled the port side (surf side) rear ballast along with the front-center ballast, both completely full. We then filled the starboard (non-surf side) ballast about 40%. The wakeplate was set at about 80% and the PP at 11.4 mph. This created a very steep and long wave that was absolutely clean as can be. I will post some pics when I get time.