diff --git a/conf/messages.xml b/conf/messages.xml
index dce6956e7b..41f4b66cb2 100644
--- a/conf/messages.xml
+++ b/conf/messages.xml
@@ -1777,12 +1777,20 @@
   <message name="WORLD_ENV" id="20">
     <field name="wind_east" type="float" unit="m/s" format="%.1f"/>
     <field name="wind_north" type="float" unit="m/s" format="%.1f"/>
+    <field name="wind_up" type="float" unit="m/s" format="%.1f"/>
     <field name="ir_contrast" type="float"/>
     <field name="time_scale" type="float"/>
     <field name="gps_availability" type="uint8" values="OFF|ON"/>
   </message>
 
-  <message name="WORLD_ENV_REQ" id="21"/>
+  <message name="WORLD_ENV_REQ" id="21">
+    <field name="lat"  type="float" unit="deg"></field>
+    <field name="long" type="float" unit="deg"></field>
+    <field name="alt"  type="float" unit="m"></field>
+    <field name="east" type="float" unit="m"></field> <!-- local ref. -->
+    <field name="north" type="float" unit="m"></field> <!-- local ref. -->
+    <field name="up"   type="float" unit="m"></field> <!-- local ref. -->
+  </message>
 
   <message name="CIRCLE_STATUS" id="22">
      <field name="ac_id" type="string"/>