Steam Frigate

 is a generic naval unit available in the Industrial Era after researching the Propeller technology.
 * Description
 * Paddle-driven steam warships prove popular designs, but are liable to be superseded through rapidly evolving naval technology.

Class and Specialty

 * No special rules.
 * No special rules.

Upgrades from
Upgrade cost and needs,  access on empire.
 * Cog (generic)