Establishing a specialist Navigation School (usually in a nation's capital) ensures that the best captains and admirals are serving in your navy. All of them possess the latest knowledge concerning navigation, battle maneuvers, map reading skills, etc., ensuring your nation's supremacy at sea. At the same time the state provides generous payment for all admirals of its navy, which encourages more and more young people to pursue naval careers.
- A Great Admiral appears.
- +2 Movement for all Great Admirals.
- Great Admirals are earned 50% faster.
This is another in the series of Policies upgrading Great People. In Civilization V it is not easy to earn a Great Admiral - naval action is not that frequent, especially in the earlier eras, and this Policy greatly facilitates earning Admirals. The movement bonus, on the other hand, allows them to keep up with modern ships' speed, thus greatly increasing the general speed a fleet can move with.
However, if you're not a particularly aggressive nation, this Policy becomes a bit useless. Without military action, you don't need Great Admirals (which will just sit there, costing you Gold, without doing anything, really). In that case, it's better to adopt the other level 2 Policy in the tree first.
In 1418 AD, Prince Henry of Portugal founded the first school for the study of oceanic navigation, along with an astronomical observatory, at Sagres. Here Portuguese pilots were trained in navigation, map-making, the science of tides and currents, and other skills to better enable them to sail the coasts of Africa, where Henry wanted to establish a string of ports leading to the riches of the Far East. As exploration and colonization reached a fevered pitch in the 1600s, most European monarchs followed Henry's lead and established navigation schools.