Sea like a mirror.
One. Ripples with the appearance of scales formed, but without foam crests.
Two. Light. Small wavelets, short but pronounced; crests appear glassy, do not break.
Three. Gentle. Large wavelets with crests beginning to break; foam appears glassy. Perhaps scattered white horses (white foam crests).
Four. Moderate. Small waves, becoming longer; fairly frequent white horses...
Five. Fresh. Moderate waves of a pronounced long form; many white horses, possibly some spray.