diff --git a/src/app/components/AvailableModulesMenu.jsx b/src/app/components/AvailableModulesMenu.jsx
index aca49b8c..6a8d1de2 100644
--- a/src/app/components/AvailableModulesMenu.jsx
+++ b/src/app/components/AvailableModulesMenu.jsx
@@ -56,7 +56,6 @@ const GRPCAT = {
   'nl': 'ordnance',
   'sc': 'scanners',
   'ss': 'scanners',
-  'pwa': 'scanners',
   // Utilities
   'cs': 'scanners',
   'kw': 'scanners',
@@ -74,7 +73,12 @@ const GRPCAT = {
   'gfsb': 'guardian',
   'gmrp': 'guardian',
   'gsc': 'guardian',
-  'ghrp': 'guardian'
+  'ghrp': 'guardian',
+
+  // Mining
+  'scl': 'mining',
+  'pwa': 'mining',
+  'sdm': 'mining'
 };
 // Order here is the order in which items will be shown in the modules menu
 const CATEGORIES = {
@@ -105,7 +109,7 @@ const CATEGORIES = {
   // Guardian
   'guardian': ['gpp', 'gpd', 'gpc', 'ggc', 'gsrp', 'gfsb', 'ghrp', 'gmrp', 'gsc'],
 
-  'mining': ['scl', 'pwa'],
+  'mining': ['scl', 'pwa', 'sdm'],
 };
 
 /**
diff --git a/src/app/i18n/en.json b/src/app/i18n/en.json
index 523592dd..3badba14 100644
--- a/src/app/i18n/en.json
+++ b/src/app/i18n/en.json
@@ -134,6 +134,7 @@
     "gmrp": "Guardian Module Reinforcement Package",
     "pwa": "Pulse Wave Analyser",
     "scl": "Seismic Charge Launcher",
+    "sdm": "Sub-Surface Displacement Missile",
     "tbsc": "Shock Cannon",
     "gsc": "Guardian Shard Cannon",
     "psg": "Prismatic Shield Generator",
diff --git a/src/app/shipyard/Constants.js b/src/app/shipyard/Constants.js
index 0afd368d..8b6b06fc 100755
--- a/src/app/shipyard/Constants.js
+++ b/src/app/shipyard/Constants.js
@@ -96,6 +96,7 @@ export const ModuleGroupToName = {
   tbrfl: 'Remote Release Flechette Launcher',
   pwa: 'Pulse Wave Analyser',
   scl: 'Seismic Charge Launcher',
+  sdm: 'Sub-Surface Displacement Missile',
 };
 
 let GrpNameToCodeMap = {};