Here's an situation that came up in a game yesterday. My opponent had Snap Shot Ezra, and I moved a ship close to his main arc danger zone. He checked range to see if Snap Shot triggered - I was just outside of Range 1. But that raised an interesting question:
If you measure range/arc for Snap Shot, are you then obligated to perform the attack?
I can see arguments both ways: Measuring, outside of standard attack activation, usually requires explicit intent to do something: barrel roll, target lock, etc. By measuring, you're declaring an intent to use the attack. Conversely, though, Snap Shot clearly states "may" perform the attack. You're just seeing if it's a legal option. This also brings up another possibility, which I admittedly think treads awfully close to rules lawyering...
If you have already used Snap Shot, are you still allowed to measure range/arc after a ship activates, even though you can't perform the attack?