During the winters, your movement points are restricted by 45%. But this shouldn't affect navies, right?
So my naval movement is restricted by 45%, but if you select and reselect the navies, you can have the full 100% move points. (the arrow was intially red, saying you are out of points, but if you reselect, the area becomes green)
Here is what I'm talking about:
https://img246.imageshack.us/img246/...gnglitcmo6.jpg