If the mod is greyed out, it means some of it's changes were changed again by a mod installed after it. This means you shouldn't try to disable the greyed out mod until after you disable the later one first.

It also provides a clue as to what may be causing any problems you may be having with your mod soup.

swdw, I was wondering about the kind of testing that goes into this sort of mod (which I gather is quite a lot). From reading the thread, it seemed to be along the line of setting up a single mission, with a large convoy, and flinging in a few torpedoes to see how they react. This strikes me as a very slow and labor intensive method. Would it be possible to make a "shake and bake", playable mod for XYZ merchant, make whatever changes to drag coefficients/engines/etc., and drive it around awhile, instead? This way, one could tabulate how long it took to reach 10 knots, or how large the turning circle was, etc., etc.

What do you think?

First off, what are your system specs and RAM?

The bearing plotters are known memory hogs; some have problems with them. If you have enough memory, it may be due to compatibility issues with the Nav Map Makeover, as you suspect.