Navigation Instruments
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Blundell Harling Portland Course Plotter Kit
RRP: £20.50
Our Price: £17.95
The Portland course plotter kit includes a 7" single handed divider and a Portland course plotter. Learn More -
Blundell Harling Portland Course Plotter
RRP: £11.95
Our Price: £9.95
The Portland Course Plotter has a bright blue directional arrow to prevent accidental reciprocal bearings, the edges are graduated for tide and boat speed, and the base has a fixed grid, making it easy to plot latitude from your GPS system. Learn More -
Blundell Harling Parallel Rule
RRP: £23.95
Our Price: £19.95
The Blundell Harling parallel rule is manufactured from high quality acrylic, bevelled on all four edges, and features solid brass links, all other metallic parts are manufactured from non-corrosive materials. Rubber pads are fitted to the underside to prevent slipping. Available in 3 sizes. Learn More -
Blundell Harling Portland Triangle
RRP: £7.49
Our Price: £6.95
The Portland Triangle has protractor markings and compass points with reciprocals in red, and scale in millimetres. It is manufactured from strong acrylic and can be used in pairs as a parallel rule, Available in two sizes, 200mm or 230mm. Learn More -
Blundell Harling Portland Solid Brass Single Handed Divider
RRP: £12.49
Our Price: £9.95
Portland Solid Brass Single Handed Divider, traditionally designed with a solid brass construction and stainless steel points. Available in 7" and 8" sizes. Learn More -
Blundell Harling Speed Time Distance Calculator
RRP: £7.49
Our Price: £6.95
The Blundell Harling speed time distance calculator is a simple to use slide rule, that will calculate the third variable given the other two. Learn More -
Blundell Harling Portland Protractor
RRP: £10.49
Our Price: £8.95
The Portland Protractor is a Douglas-type square pattern navigational protractor, that can also be used as a simple parallel rule and plotter. It is available in two sizes, 125mm and 250mm. Learn More -
Blundell Harling Speed Time Distance Calculator NATO Pattern
RRP: £12.49
Our Price: £9.95
Simple to use slide rule, calculates the third variable given the other two (distance covered, given speed and elapsed time), outer sleeve manufactured from high impact plastic. Learn More -
Blundell Harling Solid Brass Straight Divider
RRP: £12.49
Our Price: £9.95
Good quality solid brass straight divider in a traditionally designed. Solid Brass finish with stainless steel points. Available in 7" and 8" sizes. Learn More -
Blundell Harling Brass Rolling Rule
RRP: £194.50
Our Price: £159.95
The Blundell Harling brass rolling rule is supplied to Naval personnel around the world. It is made from brass and stainless steel and comes in its own wooden case. Learn More -
Blundell Harling Portland Plotter
RRP: £39.95
Our Price: £34.95
Features a movable disc the allows magnetic variation to be set on the instrument, movable arm divided into millimetres, and captain Fields' protractor markings. At 400mm in length it comfortably covers the largest Admiralty Chart. Learn More






