The caravel of the 15th and 16th centuries was a ship with a distinctive shape and admirable qualities. A gently sloping bow and single stern castle were prominent features of this vessel, and it carried a mainmast and a mizzen mast that were generally lateen-rigged. Although the caravel had already been in use for hundreds of years, it developed into an incredibly fast, easily maneuverable vessel by this time, which was noticed by eminent people.