Navigation Beam?... I assume you mean the pressing B (PC version) to see a beam indicating your path? Certain missions have it disabled due to story reasons, but should work otherwise. That said, you hardly ever need it, game is very linear.
yea i mean the path beam and your right it really is,but like im on chapter 6 and only was able to use it in the very 1st few minutes,i usually dont need it but when you have to soar around in space while on oxygen,its easy to get turned around.