Blundell Harling Portland Protractor
The Portland Protractor is a traditional 5” square navigational protractor based on the Douglas protractor. Use as a simple parallel rule and plotter. Still popular with a lot of navigators. Supplied with instructions. In addition it is easy to use in cramped and rough conditions.
- Douglas-type square pattern navigational protractor
- Can also be used as a simple parallel rule and plotter
- Size: 5”x 5″
Navigational products manufactured by Blundell Harling Ltd.
Blundell Harling Ltd manufacture the ‘Portland’ range of navigational products in Weymouth, Dorset. The Portland course plotter was designed in partnership with the RYA. As a result, the RYA recommends the Portland course plotter for its training courses. Used with Imray and Admiralty charts to learn to plot accurate courses and work out bearings. Blundell Harling also supplies solid brass chart dividers for use with the plotters. The solid brass dividers come in a choice of single handed (SH) or straight, 175mm/7″ or 200mm/8″. As a result the leisure marine industry uses the Portland course plotter and solid brass chart dividers as a manual backup in the event of electronic chart failure on yachts and motorboats.
Furthermore, Blundell Harling manufactures and supplies a range of products including protractors, Portland triangles, STD calculators, and parallel rules to the commercial shipping industry Worldwide.