Abstract: The instant invention is a navigation aid for use in depicting the buoyage system for navigable waters. The device has a support base that is secured to the helm of the vessel having a rotatable faceplate with daymark indicia placed thereon. The device provides a reminder to the vessel operator of the buoyage system and the position of the vessel in relation to the buoyage system. The device may be illuminated for nighttime usage by either direct or indirect illumination. A method of incorporating the positioning indicia in combination with a chart plotter is provided.