Hello all.

Can anyone explain what are the long and short greenish lines for in this compass, or how to use them ? Many sites on the net without clear explanation.

They can be rotated with the bezel, it is not about the black fixed line aligned to the sight not shown in the picture.

 

----> http://www.galaxyarmynavy.com/prodimages/400-big.jpg

Magnetic North and True North

No way.

The short and long green lines are at 45 degrees, and both turn together by the same bezel. Being declination (magnetic to true bearing) would be only for specific isogonic locations with 45 degrees declination.

Edited January 21, 201610 yr by Externet

Um well the numbers around the outside are circle degrees and the marschzahl

Found this second paragraph now :

 

They are supposed to allow you to navigate in the dark. You should be able to point one of the lines in the direction you want to travel.

 

 

Found a book

 

https://books.google.ie/books?id=deRKF5kv5wwC&pg=PA509&lpg=PA509&dq=compass+long+and+short+lines&source=bl&ots=EvolFta8VK&sig=cwolP5K0Itga6tubK1QOLw12tp0&hl=en&sa=X&ved=0ahUKEwjhvYeG1LnKAhXEvxQKHVo1DRoQ6AEIHDAA#v=onepage&q=compass%20long%20and%20short%20lines&f=false

Edited January 21, 201610 yr by fiveworlds