In ship combat, what would locking in the auxiliary power do? Any advantages etc?

Give a temporary boost to one specific area, like speed or shields or damage for one weapon? Sounds about right for me. Personally I'd make it a trade-off for something else, like a debuff after the effect ends or something, but that's just me.

Cross post from d20radio I think, but I'd just call this the Copilot action (page 237). No need to codify things like this, unless you're making it a talent.