Rulers, Plotters & Chartwork sets
Portland Course Plotter 655.32
€22.90*
(Formerly: Breton plotter) Easy-to-use course device with rotating rose. It is placed in the direction of the course or bearing and the grid of the rose is turned parallel to the nearest meridian or p
Portland Speed-Time-Distance Calculator 655.31
€11.40*
Portland Speed-Time-Distance-Calculator.With the help of the Portland Speed-Time-Distance-Calculator it is possible to determine the distance travelled at any time for a given speed. Likewise the requ