system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar] Why did a mobile uplink facility exist at all, let alone why did it exist in the Hallelujah Mountains?

What were the circumstances surrounding its establishment?
gpt
Odds are the Avatar program once had operatives, or planned to have operatives, in or around the mountains. That particular project would likely have shuttered after the shootout that led to the closure of Grace's school and the collapse of relations with the Omaticaya clan.

As for why they would, the concern would not simply be latency in the neural uplink, but just about every other form of communication. What if an Avatar experiences any serious problem—loss of supplies, injury, needing backup, what have you—in an area where it's difficult to communicate with or be reached from Hell's Gate? It would make sense to have a sort of forward operating base with supplies and scientists on standby.