A spar for a sailing vessel comprises an elongated member which projects
upwardly at an oblique angle from the centerline of the vessel deck and
defines a longitudinal axis of rotation. The elongated member has a
longitudinal slot for mounting the jib. The elongated member has a
longitudinally extending aerodynamic surface defined by a
quasi-elliptical shape with identical starboard tack and port tack
leading edges symmetric about a plane through the rotational axis and the
slot.