have a recharge bar like in world of warships
Have the ability to fire the horn for a max 5-10 secs but when ever you stop your raging horn theirs a cool down depending on how long you used it for,
so if you used the horn for the whole 10 sec then you have to wait 30 or so seconds to have the full recharge/ use the horn for a whole 5-10 secs again.