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

Price: $16.90
(as of Mar 29,2022 15:59:32 UTC – Details)

GFHFG 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.
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.