You’ve flown in more sorties than your average Guardian. One ability score of your choice increases by 1, to a maximum of 20.
Also, choose one of the following benefits to also receive. You may choose this feat more than once.
Training
You gain proficiency in any three vehicles of your choice.
Expertise
Choose one vehicle you’re already proficient with. When you make an ability check or saving throw with that vehicle, your roll may benefit from Expertise.
Furthermore, if you take the Operate a Station action with a station you normally lack a proficiency for, you may still add up to half your proficiency bonus to the action you take, if relevant.