Crunchy

I' like to know, but you'll find out in 10 days time. I am having to hold of updating my Oculus Rift though.

I'm just reading the Nav section of the manual and I'm a bit stuck with something. I'd just like to know what is the purpose of the overhead INS Update? When would you use this and is it actually modeled in this sim if you can use it? It's on page 224 of the manual.