diff --git a/crates/sylpheed-formats/src/ship.rs b/crates/sylpheed-formats/src/ship.rs
index ce9de2a..e66cf92 100644
--- a/crates/sylpheed-formats/src/ship.rs
+++ b/crates/sylpheed-formats/src/ship.rs
@@ -230,27 +230,43 @@ fn composites_for<'a>(names: &'a [String], id: &str) -> Vec<&'a String> {
 pub fn assemble_ship(bytes: &[u8], id: &str) -> Vec<ScenePart> {
     let names = xbg7_resource_names(bytes);
     let resources: HashSet<String> = names.iter().cloned().collect();
-    let comps = composites_for(&names, id);
+
+    // The PRIMARY composite carries the real ship-space layout (hull bodies +
+    // every `GN_*` hardpoint frame). Sibling composites (`e_rou_<id>_eng`,
+    // `_wep_*`) are LOCAL detail rigs — their nodes are in their own frame, not
+    // ship-space, so folding them in floats parts mid-ship. Pick the composite
+    // with the most nodes; that is the assembled hull.
+    let scenes: Vec<(String, Vec<ScenePart>)> = composites_for(&names, id)
+        .into_iter()
+        .map(|c| (c.clone(), scene_world_nodes(bytes, c)))
+        .collect();
+    let Some((_, nodes)) = scenes.iter().max_by_key(|(_, n)| n.len()) else {
+        // No composite at all → raw fallback below.
+        let mut placed = Vec::new();
+        const ID: [[f32; 3]; 3] = [[1.0, 0.0, 0.0], [0.0, 1.0, 0.0], [0.0, 0.0, 1.0]];
+        for part in names.iter().filter(|n| is_base_part(n) && ship_id_of(n) == Some(id)) {
+            placed.push(ScenePart { resource: part.clone(), m: ID, t: [0.0; 3] });
+        }
+        return placed;
+    };
 
     let mut placed: Vec<ScenePart> = Vec::new();
     let mut placed_res: HashSet<String> = HashSet::new();
-    // GN hardpoint frames, world-space, from every composite.
+    // GN hardpoint frames, world-space, from the primary composite.
     let mut frames: Vec<ScenePart> = Vec::new();
 
-    for c in comps {
-        for node in scene_world_nodes(bytes, c) {
-            if node.resource.starts_with("GN_") {
-                frames.push(node);
-            } else if let Some(res) = resolve_hull_resource(&node.resource, &resources) {
-                // Only the ship's own parts. A composite also mounts shared,
-                // cross-id turret models (`e303_wep_*` on an `e106` hull); those
-                // need the per-mount Vessel recipe and are placed separately.
-                if ship_id_of(&res) != Some(id) {
-                    continue;
-                }
-                if placed_res.insert(res.clone()) {
-                    placed.push(ScenePart { resource: res, m: node.m, t: node.t });
-                }
+    for node in nodes {
+        if node.resource.starts_with("GN_") {
+            frames.push(node.clone());
+        } else if let Some(res) = resolve_hull_resource(&node.resource, &resources) {
+            // Only the ship's own parts. A composite also mounts shared, cross-id
+            // turret models (`e303_wep_*` on an `e106` hull); those need the
+            // per-mount Vessel recipe and are placed separately.
+            if ship_id_of(&res) != Some(id) {
+                continue;
+            }
+            if placed_res.insert(res.clone()) {
+                placed.push(ScenePart { resource: res, m: node.m, t: node.t });
             }
         }
     }