A device for displaying and determining the value of the wind real of a boat, and its direction with respect to north and to be capable of determining the optimum speed of the gain of the wind from the shape of the pressure until the form of drops or port and starboard tack

摘要

A device for displaying and determine the value of the true wind of a mobile (boat) and its direction with respect to north, and to be able to determine the optimum speed of the gain of the wind (vmg) from the appearance of close to the rate of release, with the tack starboard or port the device comprising: - a base plane marked of circles, of horizontal lines, with a protractor graded to orient the strip of the apparent wind with respect to the axis of the boat - a strip of the apparent wind comprising a cursor - of a strip of the true wind making it possible to display the direction of the true wind - a strip of log graduated - of a double rapporteur whose graduations are offset having an axis which is crimped threaded - with a locking system is adjustable force the device is completed by a mobile square composed of: - a strip cut out which can slide on the axis of the strip log, which comprises a guide shoe which is positioned perpendicularly to the strip of the true wind, this shoe guide the graduated rule for measuring the vmg