diff --git a/data/fields/marker.json b/data/fields/marker.json
index e50e5955d..a0c93c517 100644
--- a/data/fields/marker.json
+++ b/data/fields/marker.json
@@ -1,5 +1,33 @@
 {
     "key": "marker",
     "type": "typeCombo",
-    "label": "Type"
+    "label": "Type",
+    "strings": {
+        "options": {
+            "aerial": {
+                "title": "Aerial",
+                "description": "Designed to be visible from the air."
+            },
+            "ground": {
+                "title": "Ground",
+                "description": "Flat marker laid in the ground."
+            },
+            "pedestal": {
+                "title": "Pedestal",
+                "description": "Raised marker mounted on a small base."
+            },
+            "plate": {
+                "title": "Plate",
+                "description": "Flat marker mounted directly on walls or similar."
+            },
+            "post": {
+                "title": "Post",
+                "description": "Raised marker mounted on a small pole or mast."
+            },
+            "stone": {
+                "title": "Stone",
+                "description": "Markings directly etched or painted on a stone."
+            }
+        }
+    }
 }
diff --git a/interim/source_strings.yaml b/interim/source_strings.yaml
index ffb729db9..46d813757 100644
--- a/interim/source_strings.yaml
+++ b/interim/source_strings.yaml
@@ -3018,6 +3018,37 @@ en:
       marker:
         # marker=*
         label: Type
+        options:
+          aerial:
+            # description for marker=aerial
+            description: Designed to be visible from the air.
+            # title for marker=aerial
+            title: Aerial
+          ground:
+            # description for marker=ground
+            description: Flat marker laid in the ground.
+            # title for marker=ground
+            title: Ground
+          pedestal:
+            # description for marker=pedestal
+            description: Raised marker mounted on a small base.
+            # title for marker=pedestal
+            title: Pedestal
+          plate:
+            # description for marker=plate
+            description: Flat marker mounted directly on walls or similar.
+            # title for marker=plate
+            title: Plate
+          post:
+            # description for marker=post
+            description: Raised marker mounted on a small pole or mast.
+            # title for marker=post
+            title: Post
+          stone:
+            # description for marker=stone
+            description: Markings directly etched or painted on a stone.
+            # title for marker=stone
+            title: Stone
       material:
         # material=*
         label: Material