Real Navigation problem

[El Hadji]

Hi everyone,

I am new here and this is my first post so apologies if this goes in the wrong section. I am taking a break from my normal Flight Simulator perversions and decided to get SH5. I also went for the Wolves of Steel mod since I am a realism freak. I also have some real-world ocean navigation skills so I opted in for Real Navigation. Problem is I can't get it to work properly...

When I try to use the nautical slide rule to plot a course etc, the initial marker ends up wrong. I attached a screenshot to illustrate what happens. I wonder what I am doing wrong here? This is how I do it:

1. Contact navigation officer to have him plot my current location.
2. I center the ruler over my U-boat and left-click to get an entry point for my new course.

But as you can see from the screenshot, the marker cross doesn't end up nowhere close to where I am at. Any suggestions?

Thank you in advance!