Chart Drawing Ship Drawing Ruler for Distance Measurement Teaching Engineering

Features: High quality material, durable in use. Use the stopwatch used in the hole over long distance. Measure the longitude on the protractor to determine the orientation. The vertice of the protractor allow for the placement of split point-or pencil at point in the hole. When drawing, used to draw the load bearing line or heading-line and measure the degree of load bearing line or-heading.

Specifications: Material: Plastic Length: Approx. 30cm/11.81in

Package Includes: 2x Triangle Rulers

note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.