Features: Good transparency, durability, exquisite appearance, printed scale with imported ink, polished pure copper gasket,, wear and durability!
Material: the ruler is made of imported acrylic sheet, with a smooth surface, which is not easily affected by temperature and the surface fluctuates.
Function of parallel ruler: It is used to draw azimuth line or course line and measure azimuth line degree or course line degree during chart operation.
Instructions for use: Hold a ruler in each hand and move in parallel alternately. During the moving operation, one hand properly presses the static ruler, and the other hand pushes the moving ruler, and the two feet alternately move in parallel until the required position is reached.
Note: During the alternate movement, prevent the static ruler from shifting. The nautical parallel ruler can also use the 20cm scale of the parallel ruler as a point to measure the angle.
وصف
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.