Breton Type Plotter.
A standard acrylic plotter with moveable compass rose and three scales o..
Chart Work Pack with Breton Plotter - Includes : Breton Plotter, 125mm Square, 7" Single Handed Divi..
Portland straight chart dividers,
made to a traditional design in brass finish with stainless steel..
Parallel Rules Captain Fields 400mm
Divided with protractor markings (double read..
Portland Course Plotter.
A bright green directional arrow prevents accidental reciprocal bearings a..
Portland Course Plotter Kit. -
Portland Course Plotter and 7"" singlehanded dividers
Movable disc enables magnetic variation to be set on the instrument
Movable arm is divided into mil..
Portland Protractor 250mm
Douglas type square navigational protractor which can a..
Speed Time Distance Calculator.
A simple-to-use slide rule to calculate the third variable gi..
Speed Time Distance Calculator NATO Size.
A simple-to-use slide rule to calculate the third v..
Portland Triangle 230mm
Strong acrylic, with protractor markings and compass po..
Portland Triangle 200mm.
Strong acrylic, with protractor markings and compass poi..