Parallel Ruler
APR06ZBA
Parallel rulers are a drafting instrument used by navigators to draw parallel lines on charts. The tool consists of two straight edges joined by two arms which allow them to move closer or further away while always remaining parallel to each other.
This ruler is used to determine the direction of a course plotted on a chart. The ruler is walked from the course line to the nearest compass rose. The course heading can then be determined.
Size:
450mm
600mm
Parallel rulers are a drafting instrument used by navigators to draw parallel lines on charts. The tool consists of two straight edges joined by two arms which allow them to move closer or further away while always remaining parallel to each other.