Weems and Plath Protractor
The Weems and Plath Protractor is a very useful development with its source in the much-used Breton Plotter (aka Portland Plotter).
The Weems and Plath Protractor has a movable compass rose grid that can be used to lay off a course or bearing, measure the distance between any two points, plot the position on a chart from a given set of coordinates and also determine the coordinates of any position on the chart.
Variations can be pre-set on the movable rose for your convenience in plotting compass bearings more easily.
The edges feature graduations markings in both inches and centimetres. In addition, a pencil with its own sharpener are included.
The Weems and Plath Protractor is a very useful development with its source in the much-used Breton Plotter (aka Portland Plotter).
The Weems and Plath Protractor has a movable compass rose grid that can be used to lay off a course or bearing, measure the distance between any two points, plot the position on a chart from a given set of coordinates and also determine the coordinates of any position on the chart.
Variations can be pre-set on the movable rose for your convenience in plotting compass bearings more easily.
The edges feature graduations markings in both inches and centimetres. In addition, a pencil with its own sharpener are included.
