When you do use it, don't panic. It's not nearly as complex as it may seem at first.

Your ship has a maneuver rating. The difference between the Veer Numbers on the current and planned card cannot be greater than your Maneuver Rating for that ship. If your rating is 5, for example, you can't go from a hard left turn ( Veer 2 ) directly to a hard right turn ( Veer 8 ). You would have to pick a card with a Veer no greater than 7 first.

You will find that it's almost a non-issue for Frigates and even our Third Rates don't have to worry unless you're doing extreme changes. I think it will be more of a factor in games that start using special damage.