Index: trunk/BNC/bnchelp.html
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--- trunk/BNC/bnchelp.html	(revision 237)
+++ trunk/BNC/bnchelp.html	(revision 261)
@@ -58,4 +58,5 @@
 &nbsp; &nbsp; &nbsp; B - 5.4. <a href=#rnxsample>RINEX Sampling</a><br>
 &nbsp; &nbsp; &nbsp; B - 5.5. <a href=#rnxskeleton>RINEX Skeleton Extension</a><br>
+&nbsp; &nbsp; &nbsp; B - 5.6. <a href=#rnxappend>Append Files</a><br>
 B - 6. <a href=#mountpoints>Mountpoints</a><br>
 &nbsp; &nbsp; &nbsp; B - 6.1. <a href=#AddMounts>Add Mountpoints</a><br>
@@ -233,4 +234,10 @@
 <p> 
 
+<a name="rnxappend">
+<p><h4>B - 5.6 Append Files</h4></p>
+<p>
+When starting BNC, new RINEX files are created by default. Probably existing files are overwritten. However, it may be desirable to append observations to already existing RINEX files following a restart of BNC after an intentional 'Stop', a system crash, or a crash BNC. Hit 'Append files' to continue with alread existing files and thus save what has been recorded so far.
+</p> 
+
 <a name="mountpoints">
 <p><h4>B - 6. Mountpoints</h4></p>