Chart Protractors and Triangles

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  • Portland Protractor 125mm (5 inch)
    A 5 inch square Douglas-type pattern navigational protractor that can also be used as a simple parallel rule and plotter...
    £8.99
  • Portland Protractor 250mm (10 inch)
    A 10 inch square Douglas-type pattern navigational protractor that can also be used as a simple parallel rule and plotter...
    £11.99
  • Portland Triangle 200mm
    A strong acrylic 200mm triangle with protractor markings and compass points with reciprocals in red and a scale in millimetres.Can be used in pairs as a parallel rule...
    £5.99
  • Portland Triangle 230mm
    A strong acrylic 230mm triangle with protractor markings and compass points with reciprocals in red and a scale in millimetres Navigation Instruments thumbnail text.Can be used in pairs as a parallel rule...
    £7.99