Yes, in SilentHunterIII\data\Menu\MouseCurs there is a file mouse.cfg. It contains the offsets for the map tools mouse cursors. Related to the specific .tga image.
Shameless plug: This small mod changes the cursors to make all line-tools get a 180-degree opposite compass scale.
(including a pixel offset fix for those images):
https://www.subsim.com/radioroom/dow...o=file&id=3704