diff --git a/Translations/strings-default.xml b/Translations/strings-default.xml
index 2e95facdd..8e1db33c1 100644
--- a/Translations/strings-default.xml
+++ b/Translations/strings-default.xml
@@ -243,6 +243,8 @@
 
  <!-- IO Options -->
  <io-options>IO Options</io-options>
+ <AV400-desc>Emit the Garmin AV400 protocol required to drive a Garmin 196/296 series GPS</garmin-desc>
+ <AV400Sim-desc>Emit the set of AV400 strings required to drive a Garmin 400-series GPS from FlightGear</garmin-desc>
  <garmin-desc>Open connection using the Garmin GPS protocol</garmin-desc>
  <joyclient-desc>Open connection to an Agwagon joystick</joyclient-desc>
  <jsclient-desc>Open connection to a remote joystick</jsclient-desc>
diff --git a/options.xml b/options.xml
index dd73aab10..8026fe376 100644
--- a/options.xml
+++ b/options.xml
@@ -889,6 +889,18 @@
     <description>strings/generic-desc</description>
    </option>
 
+   <option>
+    <name>AV400</name>
+    <arg>params</arg>
+    <description>strings/AV400-desc</description>
+   </option>
+
+   <option>
+    <name>AV400Sim</name>
+    <arg>params</arg>
+    <description>strings/AV400Sim-desc</description>
+   </option>
+
    <option>
     <name>garmin</name>
     <arg>params</arg>