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Product details of Marine Ruler Parallel Ruler Nautical Charts Parallel Ruler Mapping Points to Pull Parallel Ruler
Marine Ruler Parallel Ruler Nautical Charts Parallel Ruler Mapping Points to Pull Parallel Ruler
The main role: Before Chartwork for drawing lines bearing line or course, the degree or amount of bearing line degree course line.
Two hands each holding a ruler of David, alternately moved in parallel.
Usage: When the move operation, the appropriate force to suppress static hand -foot, one hand pushing moving feet, two feet alternately moved in parallel until the required position. Alternately moving, to prevent the static foot displacement.
colour: Transparent color
Material: plastic
size:21 Inch
1*Chart parallel ruler