diff --git a/src/app/shipyard/ModuleSet.js b/src/app/shipyard/ModuleSet.js
index 129ee019..69b93418 100755
--- a/src/app/shipyard/ModuleSet.js
+++ b/src/app/shipyard/ModuleSet.js
@@ -13,6 +13,19 @@ function filter(arr, maxClass, minClass, mass) {
   return arr.filter(m => m.class <= maxClass && m.class >= minClass && (m.maxmass === undefined || mass <= m.maxmass));
 }
 
+/**
+ * Filter SCO Modules to only return legal size.
+ * @param  {Array}  arr        Array of available FSD modules.
+ * @param  {number} maxSize    Maximum allowable size for SCO modules.
+ * @return {Array}             Subset of modules filtered based on legal size amd type.
+ */
+function sco_filter(arr, maxSize) {
+  return arr.filter(module => {
+    return !(module.hasOwnProperty('name') && module['name'] === "Frame Shift Drive (SCO)" && module['class'] < maxSize);
+  });
+}
+
+
 /**
  * The available module set for a specific ship
  */
@@ -41,6 +54,7 @@ export default class ModuleSet {
 
     this.standard[0] = filter(stnd.pp, maxStandardArr[0], 0, mass);  // Power Plant
     this.standard[2] = filter(stnd.fsd, maxStandardArr[2], 0, mass);  // FSD
+    this.standard[2] = sco_filter(this.standard[2], maxStandardArr[2]) // FSD - Filter SCO Modules
     this.standard[4] = filter(stnd.pd, maxStandardArr[4], 0, mass);  // Power Distributor
     this.standard[6] = filter(stnd.ft, maxStandardArr[6], 0, mass);  // Fuel Tank
     // Thrusters, filter modules by class only (to show full list of ratings for that class)