This is a continuation of the work of Captain Cox detailed
here.
UPDATE:
Version 1.2


- changed the color of the lines to a dark green as per request
- refined some of the lines a bit
From the Readme:
This mod aims to improve the overall appearance of the periscope views in Silent Hunter 4. It does this by using historically accurate markings, adding a layer of dirt and scratches to the lens, reducing the opacity of the attack scope, resizing the scopes and adding a more readable and appealing heading scale.
Source Drawings from
Submarine Periscope Manual:

Let me know what you think