Scaled ruler is designated for measurement and drawing of lines of a given length on maps of 1:1 000 000; 1:200 000; 1:500 000; 1:2 000 000; 1:3 000 000; 1:4 000 000 scales.
Ruler has four scales of different pitch value (1 mm; 2 mm; 1,66 mm). Both sides of the ruler contain instruction notes describing scales of maps for which they are used. This information is digitally duplicated on ruler edges.
ESVO LLC. conducts development and improvement of navigator's accessories at its production site in Chelyabinsk.
