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Hurst Douglas Square Navigation Protractor 5" 8" 10"
Product ID: douglas-square-navigators-protractor
Manufacturer: Blundell Harling
Hurst Douglas Square Navigation Protractor 5" 8" 10"

The Hurst Douglas Protractor

Sometimes called or referred to as the Hurst has proved to be a very accurate navigational guide since it was invented by Sir Henry Percy Douglas and its use today is as suited to traditional navigation as well as those of the present digital age. The Douglas Navigation Protractor is a square 360 degrees protractor graduated in 1 degree increments for plotting courses and bearings. Finding departure or latitude between two positions finding a magnetic course. Original this Marine navigators protractor was made from hard wood or marine grade brass. Today it is usually made materials such as transparent UV resistant acrylic. Although not common on commercial shipping however due to its small size is popular amongst navigators on ocean yachts and racing and also for air navigation. One useful feature of this navigators protractor is that it can be used as a string plotter or "Sutherland Plotter" named after Chuck Sutherland, a renowned kayaker who was instrumental in developing the concept. The protractor has a small hole at its centre through which a light line is fitted this allows you to measure bearings and course lines from a nautical chart. This is particularly on a small bridge or a RIB which have limited storage space.
Price: £11.50
13.33 EUR 14.38 USD 18.84 AUD
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