L42 Douglas Geologist
Douglas Geologist Protractor
Combined protractor and parallel rule, with geologist's apparent dip protractor. Includes a 12 page illustrated instruction book. Supplied in reusable cardboard storage sleeve.
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 1¬∞ increments. In addition there is a fi" x fi" grid printed on the centre section of this protractor.
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