The Rapporteur Integrale course ruler from Topoplastic is a combination of the Jean Cras plotter and the Rapporteur Topo plotter. This navigation ruler combines the two most successful plotters for aviation and seafaring. The Integral eliminates the need to work with charts and course and mooring triangles and can be operated with one hand, leaving the second hand free for holding or steering. Packed in a plastic case incl. description with sketches.