diff --git a/GameState.gd b/GameState.gd
index 35c4bbc..c41a18b 100644
--- a/GameState.gd
+++ b/GameState.gd
@@ -329,13 +329,19 @@ const SKILL_TREE: Array = [
 		"desc": "Permanent: +1 vessel in the fleet.",
 	},
 	{
+		# #70: was x=0.50 - the same lane freight's branch already occupies at
+		# this same depth (power_systems), so the two nodes were drawn
+		# directly on top of each other. Kept in line with wing (its own
+		# prerequisite, also x=0.82) instead, so the whole fleet-size
+		# doctrine branch now runs straight rather than zigzagging into
+		# someone else's lane.
 		"id": "squadron", "name": "Squadron Doctrine", "cost": 70, "requires": "wing",
-		"x": 0.50, "fleet_bonus": 1, "research_points": 2,
+		"x": 0.82, "fleet_bonus": 1, "research_points": 2,
 		"desc": "Permanent: +1 vessel in the fleet.",
 	},
 	{
 		"id": "armada", "name": "Armada Doctrine", "cost": 150, "requires": "squadron",
-		"x": 0.50, "fleet_bonus": 1, "research_points": 3,
+		"x": 0.82, "fleet_bonus": 1, "research_points": 3,
 		"desc": "Permanent: +1 vessel in the fleet.",
 	},
 ]
diff --git a/tests/test_skill_tree.gd b/tests/test_skill_tree.gd
index e7dc526..0d3d9f6 100644
--- a/tests/test_skill_tree.gd
+++ b/tests/test_skill_tree.gd
@@ -29,6 +29,24 @@ var elapsed: float = 0.0
 
 func _initialize() -> void:
 	game_state = root.get_node("GameState")
+
+	# --- #70: no two nodes drawn on top of each other -------------------
+	# SkillTreeView.node_screen_pos() places a node purely from its own
+	# (depth, x) - two nodes sharing both values land on the exact same
+	# pixel with no visual way to tell them apart. depth is derived from
+	# `requires` chains, not authored directly, so this has to check the
+	# same way the view does rather than eyeballing the data.
+	var seen: Dictionary = {}
+	for node in GameState.SKILL_TREE:
+		var key: String = "%d:%s" % [game_state.skill_depth(node.id), node.x]
+		if seen.has(key):
+			print("TEST_SKILL_TREE: FAIL (%s and %s are both at depth/x %s - drawn on top of each other)" \
+				% [seen[key], node.id, key])
+			quit(1)
+			return
+		seen[key] = node.id
+	print("no two skill-tree nodes share the same (depth, x)")
+
 	game_state.rocks = 500
 	game_state.buildings.clear()
 	game_state.extractors.clear()