diff --git a/NewHorizons/Schemas/star_system_schema.json b/NewHorizons/Schemas/star_system_schema.json
index 4ab0cdb8..40d7e8f4 100644
--- a/NewHorizons/Schemas/star_system_schema.json
+++ b/NewHorizons/Schemas/star_system_schema.json
@@ -145,7 +145,7 @@
         },
         "alwaysPresent": {
           "type": "boolean",
-          "description": "Whether the vessel should spawn in this system even if it wasn't used to warp to it."
+          "description": "Whether the vessel should spawn in this system even if it wasn't used to warp to it. This will automatically power on the vessel."
         },
         "spawnOnVessel": {
           "type": "boolean",
@@ -156,6 +156,10 @@
           "description": "Whether the vessel should have physics enabled. This must be set to false for the vessel to stay attached to a parent body.",
           "default": true
         },
+        "hasZeroGravityVolume": {
+          "type": "boolean",
+          "description": "Whether the vessel should have a zero-gravity volume around it that ignores any other sources of gravity, like the vessel works in Dark Bramble."
+        },
         "vesselSpawn": {
           "description": "The location that the vessel will warp to.",
           "$ref": "#/definitions/VesselInfo"