This Parallel Ruler allows the navigator to transfer GPS positions easily and precisely to nautical charts. Besides being an aesthetic tool in itself with its aluminum hinges and brass handles, it is invaluable for plotting waypoints. It has a metric scale along one edge to allow for taking distances and protractor marking on the other edge for plotting bearings. The parallel ruler was invented in 1584 and was in common use by the 18th century. Captain Fields improved the design by adding the protractor-style scale to the upper edge of one rule, and it is this design that is being used on this parallel ruler here. The parallel ruler can be equally used by draftsmen, surveyors, cartographers, architects and navigators to draw accurate parallel liles. It can be used by aligning one edge of the ruler with a base line and, while holding down that side of the ruler, move the other side to the location of the new line. If the new line cannot be reached in one step, then it may be necessary to “walk” the ruler across the page to the destination.
Price : $19.98
Brand : Ferocious Viking Products
