diff --git a/Startup/777-commercial.xml b/Startup/777-commercial.xml
deleted file mode 100644
index 61271b99b..000000000
--- a/Startup/777-commercial.xml
+++ /dev/null
@@ -1,18 +0,0 @@
-<?xml version="1.0"?>
-
-<!--
-************************************************************************
-Some things that ATC likes to know about.
-Durk Talsma Sept-17, 2011.
-************************************************************************
--->
-
-<PropertyList>
-    <sim>
-        <atc>
-            <acradius type="double">41</acradius>
-            <flight-type type="string">gate</flight-type>
-            <airline type="string">NONE</airline>
-        </atc>
-    </sim>
-</PropertyList>
diff --git a/Startup/c172p.xml b/Startup/c172p.xml
index ef62e95ea..45f692ade 100644
--- a/Startup/c172p.xml
+++ b/Startup/c172p.xml
@@ -9,10 +9,10 @@ Durk Talsma Sept-17, 2011.
 
 <PropertyList>
     <sim>
-        <atc>
-            <acradius type="double">5</acradius>
-            <flight-type type="string">ga</flight-type>
-            <airline type="string">NONE</airline>
-        </atc>
+        <dimensions>
+            <radius-m type="double">5</radius-m>
+	</dimensions>
+        <aircraft-class type="string">ga</aircraft-class>
+        <aircraft-operator type="string">NONE</aircraft-operator>
     </sim>
 </PropertyList>