#103 Protractor Triangle Rat Islands Chart Image Size: 40⅛" x

Chart Image Size: 40⅛" x 29⅝"

Flag of the Commonwealth of Dominica

and entrance to Desolation Sound

With 200 diagrams

Civil flag of the Republic of El Salvador

#103 Protractor Triangle Rat Islands Chart Image Size: 40⅛" xWeems and Plath Item #103 The Protractor Triangle is inscribed with black markings. Using two 45 triangles provides an easy method of plotting and performing chart work. Overview Used as a pair to transfer a directional line on a chart. Protractor scale allows easy alignment with chart meridian in any direction. Direction is maintained as one triangle is slid along the other to desired position. 90 angle helps determine lines of position. Crafted of