equipments = {

	ship_hull_submarine_1 = {
		abbreviation = "heb"
		year = 1922

		archetype = ship_hull_submarine
		priority = 2500
		
		module_slots = inherit
		
		is_convertable		= yes
		
		can_convert_from = {
			ship_hull_submarine_1
		}
	}

	ship_hull_submarine_2 = {
		abbreviation = "hec"
		year = 1936

		archetype = ship_hull_submarine
		priority = 2500
		parent = ship_hull_submarine_1
		
		is_convertable		= yes
		
		can_convert_from = {
			ship_hull_submarine_1
			ship_hull_submarine_2
		}
		
		module_slots = {
			fixed_ship_torpedo_slot = inherit 
			fixed_ship_engine_slot = inherit
			rear_1_custom_slot = {
				required = no
				allowed_module_categories = {
					ship_torpedo_sub
					ship_mine_layer_sub
					ship_radar
				}
			}
		}

		default_modules = {
			rear_1_custom_slot = empty
			fixed_ship_engine_slot = sub_ship_engine_2
		}
		sub_visibility = 20
		naval_speed = 14
		reliability = 0.70

		naval_range = 4000
		reliability = 0.70
		max_strength = 20
		

		
		build_cost_ic = 250
		resources = {
			#oil = 1
			steel = 2
		}
		type = { 
			submarine
		}
	}

	ship_hull_submarine_3 = {
		abbreviation = "hed"
		year = 1940

		archetype = ship_hull_submarine
		priority = 2500
		parent = ship_hull_submarine_2
		
		is_convertable		= yes
		
		can_convert_from = {
			ship_hull_submarine_1
			ship_hull_submarine_2
			ship_hull_submarine_3
		}
		
		module_slots = {
			fixed_ship_torpedo_slot = inherit 
			fixed_ship_engine_slot = inherit
			front_1_custom_slot = {
				required = no
				allowed_module_categories = {
					ship_torpedo_sub
					ship_mine_layer_sub
				}
			}
			mid_1_custom_slot = {
				required = no
				allowed_module_categories = {
					ship_radar
					ship_sub_snorkel
				}
			}
			rear_1_custom_slot = front_1_custom_slot
		}

		default_modules = {
			front_1_custom_slot = empty
			mid_1_custom_slot = empty
			rear_1_custom_slot = empty
		}
		
		sub_visibility = 15
		naval_speed = 15
		reliability = 0.75
		
		naval_range = 5000
		
		max_strength = 30


		
		build_cost_ic = 320
		resources = {
			steel = 2
		}
		type = { 
			submarine
		}	
	}
	ship_hull_submarine_4 = {
		abbreviation = "hee"
		year = 1944

		archetype = ship_hull_submarine
		priority = 2500
		parent = ship_hull_submarine_3
		
		is_convertable		= yes
		
		can_convert_from = {
			ship_hull_submarine_1
			ship_hull_submarine_2
			ship_hull_submarine_3
			ship_hull_submarine_4
			ship_hull_cruiser_submarine
			ship_hull_fleet_submarine
		}
		
		module_slots = {
			fixed_ship_torpedo_slot = inherit 
			fixed_ship_engine_slot = inherit
			front_1_custom_slot = {
				required = no
				allowed_module_categories = {
					ship_torpedo_sub
					ship_mine_layer_sub
				}
			}
			mid_1_custom_slot = {
				required = no
				allowed_module_categories = {
					ship_radar
					ship_sub_snorkel
				}
			}
			rear_1_custom_slot = front_1_custom_slot
		}

		default_modules = {
			front_1_custom_slot = empty
			mid_1_custom_slot = empty
			rear_1_custom_slot = empty
		}
		
		sub_visibility = 12
		naval_speed = 16
		reliability = 0.80

		naval_range = 6000
		
		max_strength = 35
		

		
		build_cost_ic = 450
		resources = {
			steel = 3
			chromium = 1
		}
		type = { 
			submarine
		}	
	}
}
