[mrandish]

Thanks for taking the time to answer. That was a perfect level of detail to give me a broad, high-level vibe on MagNav. And the answers are about as I expected. Approaches which serve as an alternative to a ubiquitous, cheap, COTS tech (like GPS), are interesting. They're usually driven by highly specialized use cases where the cheap COTS default isn't always quite adequate and there's a small but meaningful number of customers with challenging requirements and deep pockets.

I imagine larger military drones which need to navigate autonomously for extended periods over denied environments in all conditions are very interested in MagNav as a component in their sensor fusion suites. Even narrowing the current position to less than a square kilometer would make the identification problems faced by other sensors like optical much easier to solve.