1º_ It is a space with the size of "a quarter" of the total. It is used in blazoning for each division of the emblem and also in urbanism for the division into blocks and neighborhoods for administrative reasons. 2º_ It is also the place where a military regiment is housed or settled, which at first was a walled and safe place in the castles to house four soldiers and lookouts. From the latter the name is taken for the battle zone where the wounded soldiers are, or who will not fight for any reason, and are safe from enemy attack. 3º_ Detachable hatch on a ship.