Home > Navigation Equipment, CHARTS & Accessories « Back Pooleys White Edged Square Protractor Stock Status : In Stock £6.99 £5.83 ex. VAT Send to a friend Print Description Product Condition: New 128mm square. 0-360 scale on outside edge with reciprocal headings indicated adjacent. Location letters N.E., S.E., S.W., and N.W. on corners, gridded in squares of 9mm and underprinted white border for greater definition of headings scale.