A compass card is provided with a 90.degree. band of green, bordered by a 30.degree. band of red at each end of the green. A relative position indicator has a 90.degree. band of green on its mounting ring, the remaining 270.degree. being red. Intersecting arch bars are secured to the ring and border the margins of the green band, the ring being affixed to the sailboat around the compass, the arches disposed over the compass, and the compass lubber line and color bands being visible at all times, the lubber line being adjustable around the compass axis.
A method and a device for facilitating the determination of wind direction and the position of a sailing vessel on a racing course. One and the same geographical bearing determined by the wind direction can be read on both tacks. The same graduation number may be watched on both tacks and this number refers to the wind direction.
A sailboat racing calculator which is mounted on a sailboat adjacent a compass. A compass dial marked with compass bearings is coaxially rotatably supported below a reference disc having windows for viewing the compass markings on the bearing dial. A pair of starboard and port tack arms are pivotally mounted relative to the compass dial and reference disc. The dial and the tack arms are rotatable relative to one another and the disc to permit the sailor to utilize his compass readings as a guide for planning an optimum racing course.
This invention sets forth a wind tracking device particularly useful on sailing vessels for determining the best sailing direction relative to the wind. The reference card is provided with color panels which cooperate with lines on the dome to indicate best direction. Further, the card has circular lines about the axis which cooperate with a dot on the axis of the dome to indicate a 360.degree. level condition around a horizontal plane.
