public IEnumerator ChangeTarget(Airship oldTarget)
    {
        yield return(new WaitForSeconds(changeTargetIfHiddenTime));

        if (turret.Target == oldTarget && turret.TargetHidden) // controll that turrent did not change the target and target is still hidden
        {
            List <Airship> enemies = enemyList.GetEnemies().GetRange(0, enemyList.GetEnemies().Count);
            enemies.Remove(oldTarget);
            turret.TargetHidden = false;
            SearchNearestTarget(enemies.ToArray());
        }
    }