The title says it all.
Maybe un wise.
The airport has a few hidden spots that have aircraft the military would not like you having noculars on .
Be ware .
Just a heads up.
I agree with diva, you might attract unwanted attention if you are hanging around a Cuban airport with binoculars, and besides, it would be a waste of time. Santa Clara isn't particularly busy. You would have to know the schedule to be there when there was any action at all.