Compass with wind rose - 5 cm Ø

16,00 EUR ~~32,00 EUR~~

Model/Product no.: SC1137

Stock status: IN STOCK
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Description

The compass rose, as it is still used in small fishing boats and in small ships, probably has its roots all the way back to the Viking direction-finding systems. The compasses were divided into 32 lines. The compass, as seen in this picture, is also divided into 32 lines, although each of these lines is again divided into quarters. Since the compass rose has 32 lines, each line is 360/32 = 11.25 degrees. So if you want to convert a bearing like for example. NV to N 3/4 N to degrees, you have to find out how many lines you pass from the north to reach the bearing. The number of lines must then be multiplied by 11.25 to get the course in degrees. In this case the number of lines is 29.75, and the bearing is 29.75x11.25 = 334.69 degrees.

You place the compass on a horizontal surface (without any metal nearby) and shake it a little so that the dial rotates until it comes to rest. The way the crown points is north. Then you turn the glass disc so that the long green line is just above north.

The next time you use the compass, you know that when you have turned the compass so far that North is just below the green line, you know the direction.

The small line shows north-east.