Blundell Harling

7" Single Brass Dividers

The traditional single hand divider, manufactured from solid brass with non-magnetic stainless steel triangular points.

Dividers are used to measure the distance between two points on a chart, these single hand ones are able to be used with, as the name might suggest, one hand.

Also a useful training aid for students.

7" Straight Brass Dividers

The traditional straight divider, manufactured from solid brass, with non-magnetic triangular stainless steel points. Dividers are used to measure the distance between two points on a chart. gallery Toneee These straight dividers are how the traditional dividers were made. Also a useful training aid for students.

8" Single Brass Dividers

8" Single Brass Divider is able to be used with one hand when measuring the distance between two points on a chart.

Made from solid brass, this kind of divider is a must have for chart reading work.

Also a useful training aid for students.

8" Straight Brass Dividers

The traditional straight divider, manufactured from solid brass, with non-magnetic triangular stainless steel points.

Dividers are used to measure the distance between two points on a chart. These straight dividers are how the traditional dividers were made.

Also a useful training aid for students.

Captain Fields' Pattern 400mm Parallel Rule

This 400mm, Captain Fields' pattern parallel rule is divided with protractor markings (double reading) and compass points. It's manufactured from high quality 6mm acrylic and beveled on all four edges with solid brass links.

All other metallic parts are manufactured from non-corrosive materials and it has rubber pads are fitted to the underside to prevent slipping.

Also a useful training aid for students.

Captain Fields' Pattern 500mm Parallel Rule

This 500mm (20 inch), Captain Fields' pattern parallel rule is divided with protractor markings (double reading) and compass points. It's manufactured from high quality 6mm acrylic and beveled on all four edges with solid brass links.

All other metallic parts are manufactured from non-corrosive materials and it has rubber pads are fitted to the underside to prevent slipping.

Also a useful training aid for students.

Captain Fields' Pattern 600mm Parallel Rule

Parallel Rule 600mm. The Captain Fields' pattern parallel rule is divided with protractor markings (double reading) and compass points. It's manufactured from high quality 6mm acrylic and bevelled on all four edges with solid brass links.

All other metallic parts are manufactured from non-corrosive materials and it has rubber pads are fitted to the underside to prevent slipping.

Also a useful training aid for students.

Portland Course Plotter

A popular chart work instrument widely used by RYA practical & shore based instructors. It provides a quick method of plotting course and bearings and gives a direct reading of corrections for magnetic variation.

This new version has been developed in consultation with the RYA and has been engineered for both strength & fine accuracy. Compass disc incorporates special finger bars making it more easily used with cold, wet, or even gloved hands. Edge scales for tide and boat speeds.

A bright blue directional arrow prevents accidental reciprocal bearings and the edges are graduated for tide and boat speed. Fixed grid base helps plotting latitude and longitude from GPS.

Also a useful training aid for students.

Portland Navigational Triangle 200mm

This 200mm set square features protractor markings and compass points with reciprocals in red, the scale is in millimeters. Manufactured from strong acrylic, this instrument is highly durable.

Portland Triangles are often used in pairs to form a parallel rule.

Also a useful training aid for students.

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Speed Time Distance Calculator

This simple to use slide rule from Blundell Harling calculates the third variable given the other two (i.e. distance covered, given speed and elapsed time).

The outer sleeve manufactured from high impact plastic