Do like me - pretend you do the walk-around (after all, who has ever found something nowadays, it's just a regulatory requirement) glance vaguely at the aircraft from time to time (who will check ?) but during the whole trip, look constantly left, right and backwards, towards all the directions from which the enemy will come to attack you. And by doing so, you will remain safe, available to perform your duties once you are back on the bridge.