diff --git a/ChangeLog b/ChangeLog
index 90c98740..141b06ab 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -18546,3 +18546,6 @@
 2019-03-20 Fred Gleason <fredg@paravelsystems.com>
 	* Documented the 'Append Log' ['AL'] RML in the Operations
 	Guide.
+2019-03-20 Fred Gleason <fredg@paravelsystems.com>
+	* Documented the 'No Operation' ['NN'] RML in the Operations
+	Guide.
diff --git a/docs/opsguide/rml.xml b/docs/opsguide/rml.xml
index eb7757de..63cd87d4 100644
--- a/docs/opsguide/rml.xml
+++ b/docs/opsguide/rml.xml
@@ -1262,6 +1262,52 @@
     </para>
   </sect2>
 
+
+
+
+
+
+
+
+  <sect2 xml:id="sect.rml.no_operation__nn_">
+    <title>No Operation [NN]</title>
+    <para>
+      <variablelist>
+	<varlistentry>
+	  <term>Module</term>
+	  <listitem>none</listitem>
+	</varlistentry>
+	<varlistentry>
+	  <term>Mnemonic</term>
+	  <listitem><userinput>NN</userinput></listitem>
+	</varlistentry>
+      </variablelist>
+    </para>
+    <para>
+      Do nothing.
+    </para>
+    <para>
+      <userinput>NN!</userinput>
+    </para>
+    <para>
+      This RML does precisely nothing.
+    </para>
+  </sect2>
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
   <sect2 xml:id="sect.rml.pause_panel__pu_">
     <title>Pause Panel [PU]</title>
     <para>