Advance
A Royal Navy
Beginning around 1495, the Tudor monarchy invested heavily in not just ships, but extensive infrastructure to maintain and otherwise support them. This for many marked the official founding of the Royal Navy.
EnglandCountrypotential
Great BritainFormable CountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Discovery tree itself.
Modifiers
Heavy Ship Power+10%
Definitionin_game/common/advances/country_ENG.txt:82
91ai_weight = {
91add = 20
}