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Old 12-07-13, 11:22 AM   #8
v-i-c-
Watch Officer
 
Join Date: Jun 2009
Location: Berlin
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Quote:
Originally Posted by iPadCary View Post
Why are there three rings of numbers?
In the heat of battle, who's gonna be able to sort all of that out, hmm?
I see four rings of numbers. Because during WWII the U-Boats actually went into battles with a compasses containing four rings of numbers… exactly like on this virtual replica of the compass.
3 rings, 1 fixed, 2 rotatable - 4 rings of numbers:

- outer ring, relative bearing, ring is fixed (to the boats heading)

- middle ring,. true bearing, ring rotates and shows true north, it also has a second ring of mirrored numbers on it (flipped by 180°)

- inner ring, true bearing, rotates, 1/36 scale for 0.1 degree precision

I guess any navigator would prefer a precision of 0.1 degree over just 1 degree.
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