system
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human
[Star Wars] What can or can't an X-wing pilot do without an astromech droid co-pilot?

Not limited to just X-wings. Other than repairs on the go, what is the astromech necessary for? Navigation, diagnostics targeting etc.
gpt
Astromechs are the Swiss army knives of droid pilots. Although their primary role is navigation, an astromech can generally control a single pilot ship by themselves. Usually they're used to program the ship's navicomputer for local flight or hyperspace jumps. That last one is pretty key, it takes an exceptionally skilled pilot to pull off unassisted hyperspace jumps. They also control the allocation of power to different systems. When someone yells something like, "Full power to rear deflectors," they're talking to the droid.