never seen an airboat go through the everglades? no really those little c02 powered boat horns, i laughed the first time i heard it work i was floating down this river that went through a wooded section of state property that some guys who wereleaving for the day proclaimed there were no turkeys in there and they werent comming back. well we were fishing from the boat and we were horsing around and my buddy tried to scare me with the horn, when i came back down into the boat, three seperate gobblers sounded off. needless to say we came back the next day there to hunt . no turkeys to be heard, till we hit that boat horn. you see the turkeys in the area were so burnt out on owl, crow, and other noise they needed something new to sound off to.