capital_ships = {
    name = DOCTRINE_TRACK_CAPITAL_SHIPS
    background = "GFX_fleet_in_being_bg"
    icon = "GFX_doctrine_milestone_ships_naval"
    icon_frame = "GFX_doctrine_decor_naval"
    mastery = {
        multiplier = 2.0 # TODO - balance this number
        equipment = {
            capital_ship
        }
    }
}

carriers = {
    name = DOCTRINE_TRACK_CARRIERS
    background = "GFX_base_strike_bg"
    icon = "GFX_doctrine_milestone_carriers_naval"
    icon_frame = "GFX_doctrine_decor_naval"
    mastery = {
        multiplier = 5.0 # TODO - balance this number
        equipment = {
            carrier
        }
    }
}

screens = {
    name = DOCTRINE_TRACK_SCREENS
    background = "GFX_screens_bg"
    icon = "GFX_doctrine_milestone_screens_naval"
    icon_frame = "GFX_doctrine_decor_naval"
    mastery = {
        multiplier = 1.0 # TODO - balance this number
        equipment = {
            screen_ship
        }
    }
}

submarines = {
    name = DOCTRINE_TRACK_SUBMARINES
    background = "GFX_trade_interdiction_bg"
    icon = "GFX_doctrine_milestone_submarine_naval"
    icon_frame = "GFX_doctrine_decor_naval"
    mastery = {
        multiplier = 3.0 # TODO - balance this number
        equipment = {
            submarine
        }
    }
}