<P> The Spanish naval jack (Bandera de Proa o de Tajamar) is only hoisted at the prow of all Navy ships when docked or anchored in foreign waters, from sunrise to sunset . In national waters it is hoisted on Sundays, festivities and in presence of a foreign warship as soon as it moors at the dock . The national flag is always hoisted at the stern, when sailing, and from sunrise to sunset, when docked . It is a square flag (ratio 1: 1) composed of 4 quarters: </P> <Ul> <Li> First quarter, for Castile: Gules, a tower Or, masoned sable and ajouré azure; </Li> <Li> Second quarter, for León: Argent, a lion rampant gules (differing from the one on the national flag) crowned, langued and armed or; </Li> <Li> Third quarter, for Aragon: Or, four pallets gules; </Li> <Li> Fourth quarter, for Navarre: Gules, a cross, saltire and orle of chains linked together Or, a centre point vert . </Li> </Ul> <Li> First quarter, for Castile: Gules, a tower Or, masoned sable and ajouré azure; </Li> <Li> Second quarter, for León: Argent, a lion rampant gules (differing from the one on the national flag) crowned, langued and armed or; </Li>

What do the colors on the spanish flag mean