Lock On (Helm Phase, Push)
If you have at least 6 ranks in Computers, you can lock your starship’s targeting system on to one enemy vessel. You must spend 1 Resolve Point and attempt a Computers check. The DC equals 5 + 1-1/2 × the tier of the target starship + its bonus from defensive countermeasures (see page 298). If you succeed, your starship’s gunners gain a +2 bonus to gunnery checks against the target for the rest of the round. This action can be taken only once per round.
Source
Core Rulebook pg. 325