Pilot Becomes A Fireman Jockey (Fourth Of Eight) -- Flying around at 500 or more miles per hour, a jet pilot covers a lot of territory in a short time. Therefore, pilots have to be familiar with a large area before they can take to the air. Here. Lt. Hugh Turner, of Taylors, S.C., briefs the future "Firecan Jockeys" with the aid of maps that cover the ceiling and walls. With turner are (left to right): Lt. Price