Penggaris DOUGLAS Protactor Ruler
Spesifikasi Penggaris DOUGLAS Protactor Ruler
DOUGLAS Douglas Protractor and parallel ruler
The Douglas protractor is designed to assist in laying off 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 1/2” x 1/2” grid printed on the centre section of this protractor. 127 mm (5”) square.