A personal watercraft wherein air is introduced into a body through a gap formed between the body and a front hood and prohibiting permeation of sea water or other water in the body through the gap. Method and apparatus are offered which correct distortion in a spectral image with high efficiency and high accuracy, the image being formed by the two orthogonal axes. of from 15 to 60 mNm; a color material that is insoluble in the non-aqueous solvent; and a charge control agent that is soluble in the non-aqueous solvent, wherein the charge control agent contains a half-aside maleic acid copolymer containing repeating units represented by the formulae and as defined herein. A frame is disposed in engagement with the input cam lobe, and is pivotally and slidably coupled to the guide member.