>If they can see us, we can see them
Don't you mean, 'if we can see them, they can see us'?
Essentially the same, I know, but still the implications are different.
Anyway, yes, normally A-Wings aren't used for scouting; that's usually an X-Wing job. So either a Rebel battlegroup is already lurking around here, or they're just part of a vanguard.
In any case, besides launching fighters, we need to tell those engineers on that Victory to hurry up while we buy them some time.