Promotion tree naval melee

Embolon +7 Combat Strength vs. naval units.

Helmsman +1 Movement.

Reinforced Hull +10 Combat Strength when defending vs. ranged attacks.

Rutter +1 sight range.

Auxiliary Ships Heal outside of friendly territory.

Convoy +10 Combat Strength when in a formation.

Creeping Attack +14 Combat Strength vs. naval raider units.