diff --git a/artifacts/alien_research.png b/artifacts/alien_research.png
index a2f4d6a..4ea2e4e 100644
Binary files a/artifacts/alien_research.png and b/artifacts/alien_research.png differ
diff --git a/artifacts/alien_research_hover.png b/artifacts/alien_research_hover.png
index ec2c814..7c2bdba 100644
Binary files a/artifacts/alien_research_hover.png and b/artifacts/alien_research_hover.png differ
diff --git a/resources/effects/disabled_system_icon.gdshader b/resources/effects/disabled_system_icon.gdshader
new file mode 100644
index 0000000..ee2a986
--- /dev/null
+++ b/resources/effects/disabled_system_icon.gdshader
@@ -0,0 +1,8 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+void fragment() {
+	vec4 pixel = texture(TEXTURE, UV);
+	float brightness = max(pixel.r, max(pixel.g, pixel.b));
+	COLOR = vec4(vec3(1.0, 0.19, 0.16) * (0.7 + brightness * 0.3), pixel.a * smoothstep(0.03, 0.16, brightness));
+}
diff --git a/scripts/game/enemy_health_bar.gd b/scripts/game/enemy_health_bar.gd
index e81f8bc..caa267c 100644
--- a/scripts/game/enemy_health_bar.gd
+++ b/scripts/game/enemy_health_bar.gd
@@ -2,6 +2,8 @@ extends Node2D
 
 var enemy: CharacterBody2D
 var _tier_label: Label
+var _disabled_icons: Array[PanelContainer] = []
+const DISABLED_ICONS := [preload("res://assets/icons/engine.png"),preload("res://assets/icons/plasma.png"),preload("res://assets/icons/shield.png")]
 
 func _ready() -> void:
 	enemy = get_parent() as CharacterBody2D
@@ -18,14 +20,56 @@ func _ready() -> void:
 	_tier_label.add_theme_color_override("font_outline_color", Color("08111d"))
 	_tier_label.add_theme_constant_override("outline_size", 3)
 	add_child(_tier_label)
+	_build_disabled_icons()
 	_update_position()
 	_update_tier_label()
+	_update_disabled_icons()
 
 func _process(_delta: float) -> void:
 	_update_position()
 	_update_tier_label()
+	_update_disabled_icons()
 	queue_redraw()
 
+func _build_disabled_icons() -> void:
+	var material := ShaderMaterial.new()
+	material.shader = preload("res://resources/effects/disabled_system_icon.gdshader")
+	for system in 3:
+		var panel := PanelContainer.new()
+		panel.name = ["DisabledEngine","DisabledWeapon","DisabledShields"][system]
+		panel.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		panel.size = Vector2(20,20)
+		panel.light_mask = 4
+		var style := StyleBoxFlat.new()
+		style.bg_color = Color("17090be8")
+		style.border_color = Color("ff4b43")
+		style.set_border_width_all(1)
+		style.set_corner_radius_all(3)
+		style.set_content_margin_all(2)
+		panel.add_theme_stylebox_override("panel",style)
+		var icon := TextureRect.new()
+		icon.texture = DISABLED_ICONS[system]
+		icon.material = material
+		icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
+		icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
+		icon.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR
+		icon.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		icon.light_mask = 4
+		panel.add_child(icon)
+		add_child(panel)
+		_disabled_icons.append(panel)
+
+func _update_disabled_icons() -> void:
+	var active: Array[int] = []
+	if enemy.hull > 0.0 and not enemy.is_queued_for_deletion():
+		for system in 3:
+			if enemy.system_disabled(system): active.append(system)
+	for system in 3:
+		var panel := _disabled_icons[system]
+		panel.visible = system in active
+		if panel.visible:
+			panel.position = Vector2(-float(active.size()*22-2)*0.5+active.find(system)*22,-56)
+
 func _update_position() -> void:
 	global_position = enemy.global_position + Vector2(0, -enemy.get_visual_size() * 0.5 - 12.0)
 
diff --git a/scripts/game/enemy_ship.gd b/scripts/game/enemy_ship.gd
index 616a84e..b1cccdc 100644
--- a/scripts/game/enemy_ship.gd
+++ b/scripts/game/enemy_ship.gd
@@ -382,13 +382,8 @@ func disable_system(system: int) -> void:
 	if system == 2 and not system_disabled(2):
 		_offline_shields = shields
 		shields = 0.0
-	_disabled_systems[system] = 3.0
+	_disabled_systems[system] = preload("res://scripts/planets/alien_research.gd").SYSTEM_DISABLE_DURATION
 	if is_instance_valid(_shield_visual): _shield_visual.set_shield_values(shields,max_shields)
-	var popup := DAMAGE_POPUP_SCENE.instantiate() as Label
-	popup.text = "%s OFF · 3 s" % ["SILNIK","BROŃ","TARCZE"][system]
-	popup.set("text_color",Color("efa653"))
-	popup.position = position+Vector2(-30,-50)
-	get_parent().add_child(popup)
 
 func tick_disabled_systems(delta: float) -> void:
 	var shields_offline := system_disabled(2)
diff --git a/scripts/planets/alien_research.gd b/scripts/planets/alien_research.gd
index 374f952..f1529db 100644
--- a/scripts/planets/alien_research.gd
+++ b/scripts/planets/alien_research.gd
@@ -1,6 +1,7 @@
 extends RefCounted
 const ACTIVE_IDS := ["general", "weapons", "hull", "shields", "weapons_a", "weapons_a_next", "weapons_a_next_next", "weapons_a_next_next_next", "weapons_b", "weapons_b_next", "weapons_b_next_next", "weapons_b_next_next_next"]
 const BRANCHES := ["weapons", "hull", "shields"]
+const SYSTEM_DISABLE_DURATION := 5.0
 const TITLES := {"general":"Ogólna wiedza", "weapons":"Wiedza o broni", "hull":"Wiedza o kadłubie", "shields":"Wiedza o tarczach", "weapons_a":"Słaby punkt", "weapons_a_next":"Celny strzał", "weapons_a_next_next":"Rykoszet", "weapons_a_next_next_next":"Strzał w 10", "weapons_b":"Manewr wyprzedzający", "weapons_b_next":"System obrony przed obcymi", "weapons_b_next_next":"Dezorientacja celowania", "weapons_b_next_next_next":"Zakłócenia systemów obcych"}
 
 static func learned(id: String) -> bool:
@@ -27,7 +28,7 @@ static func description(id: String) -> String:
 		"hull": return "Twoja broń zadaje o 10% więcej obrażeń kadłubom obcych."
 		"shields": return "Twoja broń zadaje o 10% więcej obrażeń tarczom obcych."
 		"weapons_a": return "Każde bezpośrednie trafienie twojej broni zadaje obcym dodatkowe 5 obrażeń przed absorpcją."
-		"weapons_a_next": return "Każdy strzał ma 1% szansy wyłączyć na 3 sekundy losowy system obcego: silnik, broń lub tarcze. Obrażenia okresowe nie losują ponownie."
+		"weapons_a_next": return "Każdy strzał ma 1% szansy wyłączyć na 5 sekund losowy system obcego: silnik, broń lub tarcze. Czerwona ikona nad wrogiem wskazuje wyłączony system. Obrażenia okresowe nie losują ponownie."
 		"weapons_a_next_next": return "Trafienie dowolną bronią razi też obcych do 10 px od obrysu trafionego statku. Promień eksplozji twoich rakiet rośnie o 10 px. Bez łańcuchowych rykoszetów."
 		"weapons_a_next_next_next": return "Każde bezpośrednie trafienie zadaje pełne obrażenia jednocześnie tarczom i kadłubowi obcego. Nadal działa absorpcja."
 		"weapons_b": return "Dodatkowe 5% szansy uniknięcia obrażeń od wrogich obcych. Łączy się niezależnie z pozostałymi unikami."
diff --git a/scripts/planets/alien_research_tree.gd b/scripts/planets/alien_research_tree.gd
index 178f80e..6d11c2f 100644
--- a/scripts/planets/alien_research_tree.gd
+++ b/scripts/planets/alien_research_tree.gd
@@ -4,12 +4,13 @@ const MENU := preload("res://scripts/planets/freighter_menu.gd")
 const COLORS := [Color("dfb775"), Color("e68c77"), Color("79cba8"), Color("7bc9e6")]
 const TILE_SIZE := Vector2(36,40)
 const PLACEHOLDER_LEVELS := 4
+const COST_COLUMN_WIDTH := 48.0
 var progress: Resource
 var refreshed: Callable
 var points: Dictionary = {}
 
 func _ready() -> void:
-	custom_minimum_size = Vector2(290, 300)
+	custom_minimum_size = Vector2(330, 300)
 	resized.connect(_build)
 	_build()
 
@@ -18,11 +19,18 @@ func _build() -> void:
 		remove_child(child)
 		child.queue_free()
 	points.clear()
-	var width := maxf(290, size.x)
-	_add_skill("general", Vector2(width * 0.5, 24), COLORS[0])
+	var width := maxf(330, size.x)
+	var tree_width := width-COST_COLUMN_WIDTH
+	_add_row_cost("general",24)
+	_add_row_cost("weapons",80)
+	var row_id := "weapons_a"
+	for level in PLACEHOLDER_LEVELS:
+		_add_row_cost(row_id,142+level*46)
+		row_id += "_next"
+	_add_skill("general", Vector2(COST_COLUMN_WIDTH+tree_width*0.5, 24), COLORS[0])
 	for i in range(3):
 		var branch: String = DATA.BRANCHES[i]
-		var x := width * (float(i) + 0.5) / 3.0
+		var x := COST_COLUMN_WIDTH+tree_width * (float(i) + 0.5) / 3.0
 		_add_skill(branch, Vector2(x, 80), COLORS[i + 1])
 		for path in ["a","b"]:
 			var id: String = branch+"_"+path
@@ -57,18 +65,32 @@ func _add_skill(id: String, center: Vector2, color: Color) -> void:
 	var icon := TextureRect.new()
 	icon.texture = load("res://assets/freighter/research/" + id + ".png")
 	icon.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
-	icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
+	icon.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_COVERED
 	icon.texture_filter = CanvasItem.TEXTURE_FILTER_LINEAR_WITH_MIPMAPS
 	icon.mouse_filter = Control.MOUSE_FILTER_IGNORE
-	icon.position = Vector2(5, 1)
-	icon.size = Vector2(26, 26)
+	icon.position = Vector2.ONE
+	icon.size = TILE_SIZE-Vector2(2,2)
+	icon.clip_contents = true
 	if not unlocked: icon.modulate = Color(0.5, 0.55, 0.55, 0.65)
 	button.add_child(icon)
-	var price := MENU.label(button, "✓" if learned else str(DATA.cost(id)), 12, color if unlocked else MENU.MUTED)
-	price.mouse_filter = Control.MOUSE_FILTER_IGNORE
-	price.position = Vector2(0, 27)
-	price.size = Vector2(36, 12)
+	if learned:
+		var check := MENU.label(button,"✓",12,color)
+		check.mouse_filter = Control.MOUSE_FILTER_IGNORE
+		check.position = TILE_SIZE-Vector2(13,15)
+		check.size = Vector2(12,12)
+		check.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+
+func _add_row_cost(id: String, y: float) -> void:
+	var price := MENU.label(self,"%d pkt" % DATA.cost(id),12,MENU.MUTED)
+	price.name = "RowCost_%d" % DATA.cost(id)
+	price.autowrap_mode = TextServer.AUTOWRAP_OFF
+	price.position = Vector2(0,y-10)
+	price.size = Vector2(COST_COLUMN_WIDTH-6,20)
+	price.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
 	price.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	price.tooltip_text = "Koszt każdej technologii w tym rzędzie: %d próbek." % DATA.cost(id)
+	# The initially wrapped label may retain its old minimum height until text is shaped.
+	price.set_deferred("size",Vector2(COST_COLUMN_WIDTH-6,20))
 
 func _add_placeholder(id: String, center: Vector2) -> void:
 	points[id] = center
diff --git a/tests/ships/alien_research_test.gd b/tests/ships/alien_research_test.gd
index 0fde7d8..09fcf95 100644
--- a/tests/ships/alien_research_test.gd
+++ b/tests/ships/alien_research_test.gd
@@ -49,6 +49,8 @@ func _ready() -> void:
 	assert(screen._drawer.size.x == 490 and screen._drawer.size.y == 430)
 	var skill_buttons: Array[Node] = screen._content.find_children("*", "Button", true, false)
 	assert(skill_buttons.size() == 28)
+	var tree: Control = skill_buttons[0].get_parent()
+	assert(is_equal_approx(tree.get_node("RowCost_10").get_global_rect().get_center().y,skill_buttons[0].get_global_rect().get_center().y))
 	assert(DATA.parent("weapons_a_next_next") == "weapons_a_next")
 	assert(not DATA.purchase(progress,"weapons_a_next_next_next"))
 	for button in skill_buttons:
diff --git a/tests/ships/alien_weapon_technologies_test.gd b/tests/ships/alien_weapon_technologies_test.gd
index 957f01c..68608da 100644
--- a/tests/ships/alien_weapon_technologies_test.gd
+++ b/tests/ships/alien_weapon_technologies_test.gd
@@ -70,18 +70,30 @@ func _ready() -> void:
 	assert(target.system_disabled(2) and target.shields==0.0)
 	target.regenerate_defenses(1.0)
 	assert(target.shields==0.0)
-	target.tick_disabled_systems(3.1)
+	var health_bar: Node2D = target.get_node("HealthBar")
+	health_bar._process(0.0)
+	assert(health_bar.get_node("DisabledShields").visible)
+	assert(not health_bar.get_node("DisabledEngine").visible and not health_bar.get_node("DisabledWeapon").visible)
+	target.tick_disabled_systems(4.9)
+	assert(target.system_disabled(2),"System remains disabled for five seconds")
+	target.tick_disabled_systems(0.2)
+	health_bar._process(0.0)
+	assert(not health_bar.get_node("DisabledShields").visible)
 	assert(not target.system_disabled(2) and target.shields==85.0)
 	target.disable_system(1)
 	var count := get_child_count()
 	target._fire_plasma(Vector2.RIGHT)
 	assert(get_child_count()==count,"Disabled weapons cannot fire")
 	target.disable_system(0)
+	target.rotation = 1.2
+	health_bar._process(0.0)
+	assert(health_bar.get_node("DisabledEngine").visible and health_bar.get_node("DisabledWeapon").visible)
+	assert(is_zero_approx(health_bar.global_rotation),"Status icons stay upright as the enemy turns")
 	target.velocity = Vector2.ZERO
 	target._activated = true
 	target._physics_process(0.1)
 	assert(target.velocity.is_zero_approx(),"Disabled engines cannot produce thrust")
-	target.tick_disabled_systems(3.1)
+	target.tick_disabled_systems(5.1)
 	assert(not target.system_disabled(0) and not target.system_disabled(1))
 	reset_enemy(target,0.0)
 	target.take_research_dot(10,DamageTypes.Type.RADIATION,0)