The Douglas protractor is designed to assist in laying of a course or bearing; reading a bearing; finding departure or latitude between two positions; finding a magnetic course; fixing graduations in 1ÔøΩÔøΩ_ÔøΩÔøΩ increments. In addition there is a fi" x fi" grid printed on the centre section of this protractor. - 127mm (5") square.
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