Can you check range/arc for FAA and then choose not to use it since it is a "may"?
Card: After you execute a maneuver, if you did not overlap a ship or obstacle and there are no enemy ships inside your firing arc at range 1-3, you may perform a free boost or barrel roll action.
From FAQ, ships may use the range ruler to check range and firing arc:
• When a player declares a ship’s ability that requires another ship (or ships) to be at a certain range, the player trying to resolve the ability can measure range from their ship to any valid ships before resolving the ability
And from the TFA rulebook:
• Unless a card ability uses the word “may” or has the “Action:” or “Attack:” headers, the ability is mandatory and must be resolved.
To me that means you can declare the ability, measure, and then do not have to resolve the ability because of the may clause, but wanted to see what others thought.