Omen
Teacher of the Waves
Poseidon may rule the waves, but Athena tamed them with ships.
Potential
Has DLC: 
Fate of the Phoenix
Fate of the PhoenixExact conditions
With Monarch power percentage in country (Military Ability): ×1 at 0% → ×2 at 100%
Formula: Monarch power percentage in country (Military Ability) + 1
Monthly Navy Tradition+0.25 → +0.5
god = athena_god
country_modifier = {
scale = {
value = "monarch_power_percentage_in_country(power:mil)"
add = 1
}
}