A bottom shape in which the stringer is lower than the rails when viewed from the side. Originated in the tail area during the late 1960s by Australian designer Bob McTavish and several contemporaries, it allows a board to roll positively from rail to rail in turns. Tail vee was a design standard until the early 1990s, when experiments with concaves and reverse vee (see reverse vee) virtually eliminated it from small wave equipment. Still the preferred bottom contour in many medium to large wave designs.