Lalizas Parallel Rullers

♦ are used to map and calculate directions or positions in the letter.

 

♦ The conveyor scale will measure any angle using compass meridian of longitude. Follow these steps:

 

1. Aligns rule desired heading an

 

2. "Walk" the rule until this point S focuses on a meridian of longitude.

 

3. The course will be indicated on the scale at the edge of the ruler. The outer scale 0-180 ° for directions to the West and within 180 º -360 º East.