We were told that the captain of the ships give up control of the ship to a pilot who took us through the entire canal. To navigate each lock we were pulled through by small "locomotives" tied to the ship. The picture at the top is of one of the original locomotives used in the early 1900's. The picture at the bottom is one of the ones that pulled us through the first lock. Oh, by the way, the captain of our ship was a woman. Captain Karin is the first female captain of a Royal Carribean cruise ship.