I think NAV has a lot going for it. 

However, I think the graphic design of NAV looks dated and somewhat dorky.  To me it looks behind the times, but not in a hip retro way like Digibyte's logo.  I personally wouldn't wear anything with the NAV logo I can only imagine how uncool it must appear to teenagers.   

In my opinion the whole presentation of the coin needs a top-down reworking by a top designer.