Marine Ruler Parallel Ruler Nautical Charts Parallel Ruler Mapping Points to Pull Parallel Ruler 450MM

Marine Ruler Parallel Ruler Nautical Charts Parallel Ruler Mapping Points to Pull Parallel Ruler 450MM Description

colour:Transparent color Material:plastic size:450mm Package Contents: 1*Chart parallel ruler Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Hold a David ruler in each hand and move alternately in parallel. Main function: It is used to draw the bearing line or route before the line, the degree of bearing line or the degree or measure line of the route. How to use: When moving, use appropriate force to suppress the static force of the hands and feet, and push the feet with one hand. Alternately move your feet in parallel until you reach the desired position. Alternate movement to prevent static foot displacement.