I have a 81' Oday 22. It is a 3/4 rig. The mast measures 27' 1 3/4" long. The measurement from the deck mount mast step to the water line is 3' 9 1/2". Total mast height above water is 30' 11 1/4". If you have a windex, add 1' 1". Just general info.Erik