[anovikov]

Why don't planes just carry a good INS? In today's world, it shouldn't be that bad.

[lisper]

Money. INS is still very expensive relative to GPS, and GPS is pretty frickin' reliable 99.99% of the time.

[jcims]

Would commodity six axis sensors have enough precision to do a reasonable job at INS?. Buy a pack of iPhones and use some kind of quorum protocol to reduce the risks associated with one going bad?

[lisper]

> Would commodity six axis sensors have enough precision to do a reasonable job at INS?

I don't know, but my guess would be no. If it were that easy someone would have done it already.

But who knows? Maybe there's an untapped opportunity here. Why don't you buy one of these:

https://vetco.net/products/9-axis-inertial-navigation-module...

and take it with you the next time you fly (or drive) and see how accurate it is?

[anovikov]

No, they won't, not at all.